This is a revised version of my Williamson Tree. The previous one was limited to the family of Cornelius Williamson, son of Willem Williamson & Mayken Wyckoff. I had planned to publish a separate tree for Cornelius’ brother William, as both of them lived in Hunterdon County, but have since realized that it is better to start the tree with their parents and include all their siblings.

As a result of beginning so early, I felt compelled to include seven generations rather than my typical six. Children of married daughters are included, but grandchildren are not. In-laws whose family trees have been published here are shown in caps. In addition, I have added residential information where possible. I am in no doubt that there is a lot of missing information here and will welcome corrections and additions.

First Generation

(1) Willem Williamson (1651 – 1722)
& Mayken Pieterse Wyckoff (c.1653 – bef. 1721)

William Williamson, son of Willem & Mary Williamson of Gravesend, Long Island, immigrants from Holland. Mayke Pieterse Wyckoff, daughter of Pieter Claesen Wycoff and Grietja Van Ness, also immigrants from Holland to NY.1
In response to this version of the tree, Richard Williamson provided this information (12/19/2021):
William Williamson, son of Willem GERITTSEN & Mary  ?(last name UNK) of Gravesend, Long Island, immigrants from(Bermuda).
Mayke Pieterse Wyckoff, daughter of Pieter Claesen Wycoff and Grietja Van Ness, also immigrants from Holland to NY.

Second Generation

(1) Willem Williamson & Mayken Pieterse Wyckoff
|    (2.1) Cornelius Williamson (c.1672 – 1772) & Grietje Gulick (c.1680 – ) By the way, that birth-death dates for Cornelius seem a little unlikely.
|    (2.2) William Williamson (c.1678 – after 1767) & Gattelyntye Gulick (c.1684 – )
Note: Grietje & Gattleyntye were sisters and daughters of Joachem Bulick & Jakementie VanPelt, immigrants from the Netherlands who settled in Somerset County, NJ.
|    (2.3) Peter Williamson (1682 – after 1731) & Cornelia Johnson (c.1685 – )
|    (2.4) Marretje Mary Williamson (1685 – ) & Bartholomew Marsh
Ancestry.com has a Bartholomew & Mary Marsh living in England; must be someone else.
|    (2.5) Nicholas Williamson (1689 – 1779)
|    |    |   m.  1) Lucretia Voorhees (c.1690 – bef. 1773)
|    |    |   m. 2) Rachel (c.1695 – after 1760)
|    (2.6) Ann Annetje Williamson (c.1695 – after 1773) & John Griggs Jr. (c.1686 – 1761)
|    (2.7) Jacob Yacobus Williamson (1720 – after 1772) & Marya

Third Generation

(1) Willem Williamson & Mayken Pieterse Wyckoff
|    (2.1) Cornelius Williamson & Grietje Gulick of Amwell Twp., H.C.
|    |    (3.1) William Williamson Sr. (c.1708 – 1765) & Patience Hull (1713 – 1787)
|    |    (3.2) Samuel Williamson (c.1710 – )
|    |    (3.3) Cornelius Williamson (c.1710 – 1767) & Elizabeth (c.1715 – after 1768)
|    |    (3.4) Jakementie Jemima Williamson (c.1715 – ) & George Duckworth (1710 – 1767)
|    |    (3.5) Abraham Williamson (c.1720 – ) & Hendrikje
|    (2.2) William Williamson & Gattelyntye Gulick of Middlesex Co., NJ
|    |    (3.1) Johannis John Williamson (1711 – c.1769) & Mary
|    |    (3.2) William Williamson (c.1715 – ) & unknown spouse
|    |    (3.3) Catalyntye Williamson & George Van Nest
|    |    (3.4) Jannitye Jane Williamson (c.1720 – ) & John Piatt (c.1705 – )
|    (2.3) Peter Williamson & Cornelia Johnson (See article by Perry Streeter)
|    |    (3.1) William Elbert Williamson (c.1716 – ) & Ann Antje Voorhees
|    (2.5) Nicholas Williamson & 1) Lucretia Voorhees of Amwell Twp., H.C.
|    |    (3.1) Eva Williamson & Peter Perrine
|    |    (3.2) Garret Williamson (1728 – 1802)
|    |    |    |    m. 1) Charity Geertje Bennet (1731 – bef. 1787)
|    |    |    |    m. 2) Alche Peterson (1743 – )
|    (2.5) Nicholas Williamson & 2) Rachel
|    |    (3.3) Benjamin Williamson (c.1730 – )
|    |    (3.4) Jacob Williamson (c.1730 – )
|    |    (3.5) Mary Maria Williamson (c.1736 – 1798) & Capt. Henry Hendrick Gulick (1734 – 1798)
|    |    (3.6) Catherine Cathelina Williamson (c.1744 – )
|    |    (3.7) William Williamson (c.1745 – ) & Mary Sutphin (c.1750 – )
|    (2.6) Ann Annetje Williamson & John Griggs, Jr. of Gravesend, Kings Co., NY
|    |    (3.1) Catharine Griggs (c.1716 – ) & Cornelius Boss
|    |    (3.2) Maria Griggs (c.1716 – ) & Samuel Garretson
|    |    (3.3) Martha Griggs (c.1719 – )
|    |    (3.4) Rachel Griggs (c.1726 – )
|    |    (3.5) John Griggs (bef. 1731 – )
|    |    (3.6) William Griggs (bef. 1731 – )
|    |    (3.7) Lydia Griggs (c.1733 – )
|    |    (3.8) Ann Griggs (c.1735 – )
|    (2.7) Jacob Yacobus Williamson & Marya of Somerset Co., NJ
|    |    (3.1) Jacobus James Williamson (c.1750 – ) & Margaret Merlatt (c.1750 – )
|    |    (3.2) Jannetje Williamson (c1751 – )
|    |    (3.3) William Williamson (1752 – bef. 1797)
|    |    (3.4) Luekresie Lucretia Williamson (c.1753 – )
|    |    (3.5) Henry Williamson (1754 – )
|    |    (3.6) Mary Marya Williamson (c.1756 – bef. 1759)
|    |    (3.7) Garret Williamson (1758 – 1819) & Johanna Breese (1763 – )
|    |    (3.8) Marya Williamson (c.1759 – )
|    |    (3.9) Antje Ann Williamson (c.1762 – )
|    |    (3.10) Sarate Williamson (c.1764 – )
|    |    (3.11) Joseph Williamson (c.1767 – )
|    |    (3.12) Winte Williamson (c.1770 – )
|    |    (3.13) Cornelius Williamson (c.1772 – )

Fourth Generation

(1) Willem Williamson & Mayken Pieterse Wyckoff
|    (2.1) Cornelius Williamson & Grietje Gulick
|    |    (3.1) William Williamson Sr. & Patience Hull of Amwell Twp.
|    |    |    (4.1) Margaret Grietje Williamson (1732 – 1812)
|    |    |    |    |    m.  1) Daniel Larew (c.1725 – 1762)
|    |    |    |    |    m.  2) John Hull (c.1730 – 1794)
|    |    |    (4.2) Cornelius Williamson (c.1735 – c.1807) & Bernice Unknown (c.1740 – bef. 1806)
|    |    |    (4.3) Samuel Williamson (c.1737 – c.1821)
|    |    |    |    |    m.  1) Margaret Grethe DeHart (c.1740 – bef. 1782)
|    |    |    |    |    m.  2) Eleanor Williamson (c.1743 – 1818)
|    |    |    (4.4) William Williamson (c.1739 – 1820) & Elizabeth Russell
|    |    |    (4.5) John Williamson (c.1741 – 1823) & Ann Nancy Wells
|    |    |    (4.6) Abraham Williamson (c.1743 – 1781)
|    |    |    (4.7) Moykee Moicah Williamson (c.1745 – 1831) & Richard HEATH (c.1724 – 1769)
|    |    (3.3) Cornelius Williamson & Elizabeth of Amwell Twp.
|    |    |    (4.1) Eleanor Williamson (c.1743 – 1818)
|    |    |    |    |    m.  1) Gesbard Gilbert Gulick (1735 – 1779)
|    |    |    |    |    m.  2) Samuel Williamson (c.1737 – c.1821)
|    |    |    (4.2) Bartholomew Williamson
|    |    (3.4) Jakementie Jemima Williamson & George Duckworth
|    |    |    (4.1) George Duckworth (1741 – 1822) & Mary (c.1743 – 1840)
|    |    |    (4.2) John Duckworth (1742 – 1822) & Jane WOLVERTON (1745 – 1822)
|    |    |    (4.3) Margaret Duckworth
|    |    (3.5) Abraham Williamson & Hendrikje (no information on residence)
|    |    |    (4.1) Eleanor Neeltje Williamson (c.1754 – )
|    |    |    (4.2) Derrick Dirck Williamson (c.1756 – )
|    (2.2) William Williamson & Gattelyntye Gulick
|    |    (3.1) Johannis John Williamson & Mary of Amwell Twp., H.C.
|    |    |    (4.1) William Williamson (1745 – after 1820)
|    |    |    (4.2) John Williamson (c.1750 – 1779) & Sarah Prall (c.1750 – 1831)
|    |    |    (4.3) Abraham Williamson (1745 – 1816) & Catharine TenBrooke (1747 – 1804)
|    |    |    (4.4) Anne Williamson (c.1750 – 1814) & Mathias HOUSEL (c.1734 – 1818)
|    |    |    (4.5) Rebecca Williamson (c.1750 – )
|    |    |    (4.6) Catharine Williamson (c.1755 – ) & unknown Whitenack
|    |    |    (4.7) Jacob Williamson Esq. (1759 – 1841)
|    |    |    |    |    m.  1) Hannah TenBrooke (1751 – 1811)
|    |    |    |    |    m.  2) Martha Baldwin (1777 – 1863)
|    |    (3.2) William Williamson & unknown spouse (no information on residence)
|    |    |    (4.1) Jannitye Williamson (c.1750 – )
|    |    |    (4.2) Lucretia Williamson (c.1750 – )
|    |    |    (4.3) Ida Williamson (c.1760 – )
|    |    (3.4) Jannitye Jane Williamson & John Piatt (no information on residence)
|    |    |    (4.1) William Piatt (c.1743 – )
|    (2.3) Peter Williamson & Cornelia Johnson
|    |    (3.1) William Elbert Williamson & Ann Antje Voorhees (no information on residence)
|    |    |    (4.1) Antje Ann Williamson (c.1753 – )
|    |    |    (4.2) William Williamson (c.1757 – )
|    |    |    (4.3) John Williamson (1747 – 1800) & Lucretia Tyson (1749 – 1832)
|    |    |    (4.4) Isaac Williamson (c.1759 – )
|    (2.5) Nicholas Williamson & 1) Lucretia Voorhees
|    |    (3.2) Garret Williamson & 1) Charity Geertje Bennet of Somerset Co., NJ
|    |    |    (4.1) Nicholas Williamson (1762 – )
|    |    |    (4.2) Eleanor Williamson (c.1763 – bef. 1798) & Oliver Purcell
|    |    |    (4.3) Cornelius Williamson (1764 – ) & Sarah Gulick (1763 – )
|    |    |    (4.4) James Jacobus Williamson (1765 – )
|    |    |    (4.5) Anne Williamson (1767 – ) & John Cock
|    |    |    (4.6) Lucretia Williamson (1768 – 1853) & Oliver Purcell
|    |    |    (4.7) Garret Williamson (c.1770 – )
|    (2.5) Nicholas Williamson & 2) Rachel
|    |    (3.5) Mary Maria Williamson & Capt. Henry Hendrick Gulick of Alexandria Twp., H.C.
|    |    |    (4.1) Samuel Gulick (1756 – 1825) & Rachel Hickson (c.1760 – )
|    |    |    (4.2) Nicholas Gulick (1758 – ) & Elizabeth Gano (c.1766 – 1856)
|    |    |    (4.3) Charity Gulick (1760 – 1835) & Derrick/Richard Hoagland (1758 – 1830)
|    |    |    (4.4) Minner Mindert Gulick (1766 – ) & Mary Gano (c.1770 – after 1804)
|    |    |    (4.5) Catherine Gulick (1768 – ) & Buckalow (c.1765 – )
|    |    |    (4.6) Mary Gulick (1770 – 1852) & Isaac Duckworth (1765 – 1852)
|    |    |    (4.7) Rancha Gulick (1774 – ) & John B. Allen (c.1760 – c.1828)
|    |    |    (4.8) Abraham Gulick (1776 – )
|    |    |    (4.9) Rachel Gulick (1780 – ) & unknown Hughes (~1780 – )
|    (2.7) Jacob Yacobus Williamson & Marya
|    |    (3.7) Garret Williamson & Johanna Breese of Somerset Co., NJ
|    |    |    (4.1) Nancy Margaret (c.1788 – )
|    |    |    (4.2) Mary Williamson (1783 – bef. 1852) & unknown Morgan
|    |    |    (4.3) Ann Nancy Williamson (1785 – )
|    |    |    (4.4) James Williamson (1790 – )
|    |    |    (4.5) Henry Williamson (1793 – )
|    |    |    (4.6) Sarah Williamson (1796 – )
|    |    |    (4.7) Garret Williamson (1801 – after 1866) & Margaret (c.1797 – )

Fifth Generation

(1) Willem Williamson & Mayken Pieterse Wyckoff
|    (2.1) Cornelius Williamson & Grietje Gulick
|    |    (3.1) William Williamson Sr. & Patience Hull
|    |    |    (4.1) Margaret Grietje Williamson & 1) Daniel Larew of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) James Larew (c.1755 – 1822) & Unknown (c.1760 – bef. 1817)
|    |    |    |    (5.2) Abraham Larew (c.1755 – after 1792) & Hannah Hull (c.1758 – )
|    |    |    |    (5.3) Catharine Larew (1762 – 1855) & Thomas Lake (1758 – c.1821)
|    |    |    |    (5.4) Mary Larew (c.1760 – )
|    |    |    (4.1) Margaret Grietje Williamson & 2) John Hull of Amwell, Hunterdon, NJ
|    |    |    |    (5.5) Moicah Hull (c.1770 – ) & Jacob Boughner (c.1770 – )
|    |    |    (4.2) Cornelius Williamson & Bernice Unknown of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) Patience Williamson (1768 – bef. 1782)
|    |    |    |    (5.2) William Williamson (1769 – 1848)
|    |    |    |    (5.3) Cornelius Williamson (1771 – 1835) & Sarah HOPPOCK (1779 – 1813)
|    |    |    |    (5.4) Bernice Williamson (1775 – 1868) & Jacob HOPPOCK (1775 – 1866)
|    |    |    |    (5.5) Asher Williamson [Sr] (1777 – 1860)
|    |    |    |    (5.6) Joseph Williamson (1780 – after 1831)
|    |    |    |    (5.7) Patience Williamson (1782 – ) & George Walldrof (c.1780 – after 1831)
|    |    |    |    (5.8) Moykee Williamson (1785 – 1868)
|    |    |    (4.3) Samuel Williamson & 1) Margaret Grethe DeHart of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) William Williamson (1759 – 1835) & Helena Lena Terhune (1763 – 1842)
|    |    |    |    (5.2) Cornelius Williamson (c.1761 – 1818)
|    |    |    |    |    |    m. 1) Styntje Demott (c.1757 – after 1797)
|    |    |    |    |    |    m. 2) Elizabeth Pittenger (c.1775 – 1841)
|    |    |    |    (5.3) Peter Petrus Williamson (1763 – 1844)
|    |    |    |    |    |    m. 1) Charity Gulick (1765 – 1804)
|    |    |    |    |    |    m. 2) Jane Britton (1787 – 1854)
|    |    |    |    (5.4) Maycke Williamson (1766 – 1845) & Abraham Terhune Jr. (c.1760 – 1854)
|    |    |    |    (5.5) Anne Antje Williamson (1768 – 1846) & Daniel Terhune (1758 – 1843)
|    |    |    |    (5.6) John Williamson (c.1777 – )
|    |    |    |    (5.7) Jacob Williamson (c.1780 – )
|    |    |    (4.3) Samuel Williamson & 2) Eleanor Williamson of Amwell, Hunterdon, NJ
|    |    |    |    (5.8) Margaret Williamson (1783 – 1865) & Abraham Deats (1782 – 1869)
|    |    |    |    (5.9) Elizabeth Williamson (1785 – 1858) & Gideon Hendrickson (1785 – 1872)
|    |    |    |    (5.10) Eleanor Williamson (1788 – )
|    |    |    |    (5.11) Ann Williamson (c.1790 – after 1825) & Andrew McClary (c.1790 – )
|    |    |    (4.4) William Williamson & Elizabeth Russell, removed to Kentucky
|    |    |    |    (5.1) John Williamson (c.1770 – 1824)
|    |    |    |    (5.2) Abraham Williamson (c.1775 – ) & Elizabeth Sutphen (c.1780 – )
|    |    |    (4.7) Moykee Moicah Williamson & Richard HEATH of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) Richard Williamson Heath (1770 – 1850) & Susan Elizabeth RITTENHOUSE (1782 – 1837)
|    |    (3.3) Cornelius Williamson & Elizabeth
|    |    |    (4.1) Eleanor Williamson & 1) Gesbard Gilbert Gulick of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) Sarah Gulick (1763 – ) & Cornelius Williamson (1764 – )
|    |    |    |    (5.2) Charity Gulick (1765 – 1804) & Peter Petrus Williamson (1763 – 1844)
|    |    |    |    (5.3) Cornelius Gulick (1767 –  after 1818) & Mary ( – after 1818)
|    |    |    |    (5.4) Derrick Gulick (1769 – 1779)
|    |    |    |    (5.5) Anna Gulick (1771 – )
|    |    |    |    (5.6) Henry Gulick (1773 – after 1850) & Rachel Hortman (~1775 – 1859)
|    |    |    |    (5.7) Peter Gulick (1776 – 1779)
|    |    |    |    (5.8) Abraham Gulick (1779 – ) & Mary Young (1772 – )
|    |    |    |    (5.9) Catherine Gulick (1771 – )
|    |    |    (4.1) Eleanor Williamson & 2) Samuel Williamson of Amwell, Hunterdon, NJ
|    |    |    |    (5.10) Margaret Williamson (1783 – 1865) & Abraham Deats (1782 – 1869)
|    |    |    |    (5.11) Elizabeth Williamson (1785 – 1858) & Gideon Hendrickson (1785 – 1872)
|    |    |    |    (5.12) Eleanor Williamson (1788 – )
|    |    |    |    (5.13) Ann Williamson (c.1790 – after 1825) & Andrew McClary (c.1790 – )
|    (2.2) William Williamson & Gattelyntye Gulick
|    |    (3.1) Johannis John Williamson & Mary
|    |    |    (4.3) Abraham Williamson & Catharine TenBrooke of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) Sarah Williamson (c.1786 – 1856)
|    |    |    |    |    |    m. 1) Derrick Richard Williamson (1777 – 1834)
|    |    |    |    |    |    m. 2) Henry Duryea
|    |    |    |    (5.2) Abraham TenBrooke Williamson (1788 – 1842) & Penelope Sutphen (1792 – 1834)
|    |    |    |    (5.3) Ann Williamson (1784 – 1867) & William Tennent Stockton (1782 – 1823)
|    |    |    |    (5.4) Catharine Williamson (1778 – 1852) & Enoch Kennedy (c.1775 – )
|    |    |    (4.4) Anne Williamson & Mathias HOUSEL of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) Agnes Housel (1763 – 1831) & James Salter (1754 – 1829)
|    |    |    |    (5.2) John Housel (1767 – 1811)
|    |    |    |    |    |    m. 1) Catharine
|    |    |    |    |    |    m. 2) Jennie
|    |    |    |    |    |    m. 3) Mary (1781 – 1846)
|    |    |    |    (5.3) Anne Housel (1770 – 1840) & Bergen Covert (1765 – 1839)
|    |    |    |    (5.4) Jacob Housel (c.1783 – )
|    |    |    |    (5.5) Mary Housel (c.1785 – ) & Unknown Case (c.1780 – )
|    |    |    (4.7) Jacob Williamson Esq. & 1) Hannah TenBrooke of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) Mary Williamson (1786 – 1835) & Abraham C. Van Doren (c.1785 – )
|    |    |    (4.7) Jacob Williamson Esq. & 2) Martha Baldwin of Amwell, Hunterdon, NJ
|    |    |    |    (5.2) Hannah Williamson (1814 – 1893) & Dennis VanLieu (1811 – 1892)
|    |    |    |    (5.3) Jacob Suydam Williamson (1816 – 1860) & Catherine Duryea (1814 – 1889)
|    |    |    |    (5.4) Gertrude Van Dervere Williamson (1818 – 1904) & George P. Rex, M.D. (1813 – 1889)
|    (2.3) Peter Williamson & Cornelia Johnson
|    |    (3.1) William Elbert Williamson & Ann Antje Voorhees
|    |    |    (4.3) John Williamson & Lucretia Tyson of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) John Williamson (c.1770 – bef. 1843) & Hannah Smith (1771 – 1850)
|    |    |    |    (5.2) William Williamson (c.1770 – c.1830) & Hannah Hoagland (1777 – )
|    |    |    |    (5.3) Jacob Williamson (1771 – 1833) & Sarah Hoagland (1775 – )
|    |    |    |    (5.4) Arthur Williamson (1773 – 1849)
|    |    |    |    (5.5) Mary Williamson (c.1775 – ) & John Robinson (c.1775 – )
|    |    |    |    (5.6) Henry Williamson (1776 – 1814) & Lucretia Chamberlain (1780 – 1839)
|    |    |    |    (5.7) Anne Antie Williamson (1779 – 1846) & Henry Young (c.1778 – 1830)
|    |    |    |    (5.8) Sarah Williamson (1780 – 1864) & Leonard Kuhl Jr. (1779 – 1812)
|    |    |    |    (5.9) David Williamson (1786 – )
|    |    |    |    (5.10) Garret Williamson (1789 – ) & Abigail Muirhead
|    |    |    |    (5.11) Lucretia ? Williamson (c.1790 – )
|    (2.7) Jacob Yacobus Williamson & Marya
|    |    (3.7) Garret Williamson & Johanna Breese
|    |    |    (4.7) Garret Williamson & Margaret, removed to Tennessee
|    |    |    |    (5.1) Sarah Williamson (1818 – )
|    |    |    |    (5.2) Silas Williamson (1819 – )
|    |    |    |    (5.3) David Henry Williamson (1820 – ) & Mary Landis (c.1821 – )
|    |    |    |    (5.4) Eleta Williamson (1823 – )
|    |    |    |    (5.5) Irene A. Williamson (c.1826 – )
|    |    |    |    (5.6) Hannah Williamson (1826 – )
|    |    |    |    (5.7) Ellen Williamson (1829 – )
|    |    |    |    (5.8) Anna Williamson (1833 – )
|    |    |    |    (5.9) Abigail Abby Williamson (1835 – )
|    |    |    |    (5.10) Caroline J. Williamson (1839 – )
|    |    |    |    (5.11) Philip Williamson (1847 – )

Sixth Generation

(1) Willem Williamson & Mayken Pieterse Wyckoff
|    (2.1) Cornelius Williamson & Grietje Gulick
|    |    (3.1) William Williamson Sr. (~1708 – 1765) & Patience Hull (1713 – 1787)
|    |    |    (4.2) Cornelius Williamson & Bernice Unknown
|    |    |    |    (5.3) Cornelius Williamson (1771 – 1835) & Sarah HOPPOCK (1779 – 1813) of Amwell, H.C., NJ
|    |    |    |    |    (6.1) Catharine Williamson (1803 – 1891) & John BUCHANAN iii (1800 – 1890
|    |    |    |    |    (6.2) Bernice Williamson (1804 – )
|    |    |    |    |    (6.3) Anna Williamson (1805 – )
|    |    |    |    |    (6.4) Cornelius Williamson (1806 – 1890) & Mary HOPPOCK (1806 – 1887)
|    |    |    |    |    (6.5) Peter Williamson (1808 – )
|    |    |    |    |    (6.6) Sarah Ann Williamson (1809 – 1853) & Samuel Arnwine CARRELL (1814 – 1861)
|    |    |    |    |    (6.7) William W. Williamson (1811 – 1901) & Sarah Young (c.1823 – after 1880)
|    |    |    |    |    (6.8) Asher Williamson [Jr.] (1812 – )
|    |    |    |    (5.4) Bernice Williamson & Jacob HOPPOCK, removed to Tinicum, Bucks Co., PA
|    |    |    |    |    (6.1) Cornelius Williamson Hoppock (1803 – 1879) & Mary Philipina Snyder (1809 – 1887)
|    |    |    |    |    (6.2) Mary Hoppock (1806 – 1887) & Cornelius WILLIAMSON (1806 – 1890) s/o Cornelius
|    |    |    |    |    (6.3) Patience Hoppock (1808 – 1869)
|    |    |    |    |    (6.4) John Williamson Hoppock (1810 – 1874) & Elizabeth Sassaman (1822 – 1871)
|    |    |    |    |    (6.5) Sarah Hoppock (1812 – 1894) & Tobias Walter (1818 – 1901)
|    |    |    |    |    (6.6) Moykee Hoppock (~1816 – 1845) & Jacob Morgan Vanderbelt (1817 – 1883)
|    |    |    (4.3) Samuel Williamson & 1) Margaret Grethe DeHart of Amwell, Hunterdon, NJ
|    |    |    |    (5.1) William Williamson & Helena Lena Terhune removed to Kentucky, died in Ohio
|    |    |    |    |    (6.1) Samuel Williamson (1785 – )
|    |    |    |    |    (6.2) John Williamson (1787 – 1877) & Jemima Dalrymple (1788 – 1847)
|    |    |    |    |    (6.3) William Williamson (1792 – 1874) & unknown spouse
|    |    |    |    (5.2) Cornelius Williamson & 1) Styntje Demott of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.1) William Williamson (1782 – 1854) & Jacamintie Jemima Vroom (1792 – 1872)
|    |    |    |    |    (6.2) John W. Williamson (1785 – 1820) & Anna M. Hagerman (1782 – 1859)
|    |    |    |    |    (6.3) Anne Williamson (1788 – 1846)
|    |    |    |    |    (6.4) Rev. Abraham Williamson (1790 – 1869) & Sarah W. Hedges (1796 – 1874)
|    |    |    |    |    (6.5) Mary Williamson (c.1792 – bef. 1846) & Peter Coxe (1784 – 1850)
|    |    |    |    |    (6.6) Cornelius Williamson (1795 – 1854) & Ann Creveling (1789 – 1851)
|    |    |    |    |    (6.7) Richard Williamson (1797 – 1876) & Catherine Gulick (1797 – 1886)
|    |    |    |    (5.2) Cornelius Williamson & 2) Elizabeth Pittenger of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.8) Eliza Williamson (c.1812 – 1857) & Joseph P. Boss Jr. (1803 – 1888)
|    |    |    |    (5.3) Peter Petrus Williamson & 1) Charity Gulick of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.1) John Williamson (1785 – bef. 1843) & Anna Bellows (c.1785 – )
|    |    |    |    |    (6.2) Gilbert Williamson (1787 – 1865)
|    |    |    |    |    |    m. 1) Elizabeth Ann Rounsaville (1791 – 1841)
|    |    |    |    |    |    m. 2) Hannah (c.1797 – )
|    |    |    |    |    (6.3) Samuel Williamson (1789 – after 1850) & Elizabeth Bird (c.1790 – after 1850)
|    |    |    |    |    (6.4) Margaret Williamson (1792 – after 1870) & John Hanna (1774 – 1823)
|    |    |    |    |    (6.5) Cornelius Williamson (1793 – 1852) & Mahala Bishop (c.1797 – 1870)
|    |    |    |    |    (6.6) Eleanor Williamson (1795 – 1893) & Jared Golden (1791 – 1872)
|    |    |    |    |    (6.7) Mahlon Williamson (1798 – bef. 1860) & Margaret Stout (c.1800 – 1861)
|    |    |    |    |    (6.8) Amy Williamson (1800 – ) & George Cobb (c.1801 – 1870)
|    |    |    |    |    (6.9) Elizabeth Williamson (1800 – ) & William West (c.1795 – bef. 1860)
|    |    |    |    |    (6.10) Charity Williamson (1804 – 1806)
|    |    |    |    (5.3) Peter Petrus Williamson & 2) Jane Britton of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.11) Charity Williamson (1809 – 1891) & Dea. Cornelius MYERS (1806 – 1891)
|    |    |    |    |    (6.12) Peter Williamson (1812 – ) & Henrietta Nutt
|    |    |    |    |    (6.13) Phoebe Williamson (1815 – ) & George Huffman (c.1795 – )
|    |    |    |    |    (6.14) Britton Williamson (1818 – )
|    |    |    |    |    (6.15) William Williamson (1820 – )
|    |    |    |    |    (6.16) Jane Williamson (1823 – ) & George C. Vancamp (c.1832 – 1902)
|    |    |    |    |    (6.17) Abraham D. H. Williamson (1826 – )
|    |    |    |    (5.4) Maycke Williamson & Abraham Terhune Jr. of Princeton, Mercer, NJ
|    |    |    |    |    (6.1) Samuel Terhune (~1789 – )
|    |    |    |    |    (6.2) Mary Terhune (~1791 – )
|    |    |    |    (5.5) Anne Antje Williamson & Daniel Terhune, removed to Kentucky
|    |    |    |    |    (6.1) Margaret Terhune (~1788 – )
|    |    |    |    |    (6.2) Mary Terhune (~1791 – )
|    |    |    (4.3) Samuel Williamson & 2) Eleanor Williamson
|    |    |    |    (5.9) Elizabeth Williamson & Gideon Hendrickson
(Elizabeth died in Somerset Co, NJ; Gideon in Ohio)
|    |    |    |    |    (6.1) Eleanor Hendrickson & Henry Hoagland (c.1815 – )
|    |    |    |    (5.11) Ann Williamson & Andrew McClary, removed to Ohio
|    |    |    |    |    (6.1) Sally Ann McClary (c.1820 – ) & Jacob Cooke (c.1815 – )
|    |    |    |    |    (6.2) Mary McClary (c.1810 – ) & Elijah Hummel Jr. (1808 – )
|    |    |    (4.4) William Williamson & Elizabeth Russell
|    |    |    |    (5.2) Abraham Williamson & Elizabeth Sutphen of Kentucky
|    |    |    |    |    (6.1) Nelson Williamson (1813 – )
|    |    |    |    |    (6.2) George W. Williamson (1814 – )
|    (2.2) William Williamson & Gattelyntye Gulick
|    |    (3.1) Johannis John Williamson & Mary
|    |    |    (4.3) Abraham Williamson & Catharine TenBrooke
|    |    |    |    (5.1) Sarah Williamson & 1) Derrick Richard Williamson of Amwell
|    |    |    |    |    (6.1) Nathan P. Williamson (c.1808 – 1813)
|    |    |    |    |    (6.2) Rebecca Maria Williamson (1811 – 1906) & David B. Kershow (1806 – 1867)
|    |    |    |    |    (6.3) Rachel Williamson (1818 – 1847) & Daniel WILLIAMSON (1810 – 1908)  s/o ?
|    |    |    |    |    (6.4) Sarah Ann Williamson (1826 – 1856) & Abraham Stryker Skillman (1805 – 1850)
|    |    |    |    |    (6.5) David Williamson (1827 – 1899) & Catharine Biggs (c.1825 – 1912)
|    |    |    |    (5.2) Abraham TenBrooke Williamson & Penelope Sutphen of Amwell
|    |    |    |    |    (6.1) Catherine R. Williamson (1810 – 1886) & Edwin H. Yerkes (1804 – 1862)
|    |    |    |    |    (6.2) John S. Williamson (c.1812 – 1861)
|    |    |    |    |    (6.3) Abraham T. Williamson (1815 – 1889) & Mary Shepherd (1821 – 1906)
|    |    |    |    |    (6.4) Ann C. Williamson (1816 – 1838)
|    |    |    |    |    (6.5) Sarah D. Williamson (1819 – 1884) & Judge Richard I. Lowe (1802 – 1889)
|    |    |    |    |    (6.6) Dr. Jacob W. Williamson (1821 – 1852)
|    |    |    |    (5.3) Ann Williamson & William Tennent STOCKTON, of Philadelphia & Virginia
|    |    |    |    |    (6.1) Richard Lucius Stockton (1817 – 1836)
|    |    |    |    (5.4) Catharine Williamson & Enoch Kennedy (She died in Amwell.)
|    |    |    |    |    (6.1) Eliza Kennedy (1799 – 1841)
|    |    |    |    |    (6.2) Cornelius Tenbroeck Kennedy (1801 – 1805)
|    |    |    |    |    (6.3) John Williamson Kennedy (1803 – 1805)
|    |    |    (4.7) Jacob Williamson Esq. & 2) Martha Baldwin
|    |    |    |    (5.2) Hannah Williamson & Dennis VanLieu of Somerset Co., NJ
|    |    |    |    |    (6.1) John Dennis VanLiew (1838 – 1928) & Elizabeth Bellis Kuhl (1839 – 1916)
|    |    |    |    (5.4) Gertrude Van Dervere Williamson & George P. Rex, M.D., of Amwell
|    |    |    |    |    (6.1) George McClellan Rex M.D. (1837 – 1889)
|    |    |    |    |    (6.2) Oliver Payson Rex M.D. (1840 – 1910)
|    |    |    |    |    (6.3) Martha Williamson Rex (1841 – 1843)
|    |    |    |    |    (6.4) Hiram B. Rex (1846 – 1864)
|    |    |    |    |    (6.5) Hannah M. Rex (1855 – 1910)
|    (2.3) Peter Williamson & Cornelia Johnson
|    |    (3.1) William Elbert Williamson & Ann Antje Voorhees
|    |    |    (4.3) John Williamson & Lucretia Tyson of Ohio
|    |    |    |    (5.1) John Williamson & Hannah Smith of Ohio
|    |    |    |    |    (6.1) David Williamson (1808 – )
|    |    |    |    (5.3) Jacob Williamson & Sarah Hoagland of Ohio
|    |    |    |    |    (6.1) Jacob Williamson (1793 – 1872)
|    |    |    |    |    (6.2) John Williamson (c.1810 – 1878) & Margaret (c.1801 – 1876)
|    |    |    |    (5.6) Henry Williamson & Lucretia Chamberlain of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.1) Mary C. Williamson (1798 – 1872) & Jacob F. Wilson (1795 – 1821)
|    |    |    |    |    (6.2) Lewis C. Williamson (1803 – 1828)
|    |    |    |    |    (6.3) Lucretia Ann Williamson (1801 – 1856) & Simeon Phillips (c.1800 – )
|    |    |    |    |    (6.4) John H. Williamson (1808 – 1876) & Caroline Prall (1814 – 1894)
|    |    |    |    (5.8) Sarah Williamson & Leonard Kuhl Jr. of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.1) Catherine Kuhl (1801 – 1835)
|    |    |    |    |    |     |   m. 1) Unknown
|    |    |    |    |    |     |   m. 2) Peter V. Quick (1805 – 1826)
|    |    |    |    |    (6.2) John Williamson Kuhl (1803 – 1846) & Martha McPherson HIGGINS (1804 – 1894)
|    |    |    |    |    (6.3) Asher Kuhl (1805 – 1830)
|    |    |    |    |    (6.4) Lucretia W. Kuhl (1807 – 1832)
|    |    |    |    |    (6.5) Leonard Lambert Kuhl (1810 – 1845) & Mary Hill Maxwell (1817 – 1849)
|    (2.7) Jacob Yacobus Williamson & Marya
|    |    (3.7) Garret Williamson & Johanna Breese
|    |    |    (4.7) Garret Williamson & Margaret
|    |    |    |    (5.3) David Henry Williamson & Mary Landis of Delaware, Hunterdon, NJ
|    |    |    |    |    (6.1) Virginia Williamson (c.1846 – )
|    |    |    |    |    (6.2) Rachel Williamson (c.1848 – ) & Dr. Andrew J. Blackwell (1846 – 1885)
|    |    |    |    |    (6.3) Mary L. Williamson (c.1850 – )
|    |    |    |    |    (6.4) Richard Williamson (1854 – 1903) & Mary E. Runkle (1857 – 1939)

Seventh Generation

(1) Willem Williamson & Mayken Pieterse Wyckoff
|    (2.1) Cornelius Williamson & Grietje Gulick
|    |    (3.1) William Williamson Sr. & Patience Hull
|    |    |    (4.2) Cornelius Williamson & Bernice Unknown
|    |    |    |    (5.3) Cornelius Williamson & Sarah HOPPOCK
|    |    |    |    |    (6.1) Catharine Williamson & John BUCHANAN iii of Amwell, Hunterdon, NJ
|    |    |    |    |    |    (7.1) Sarah Ann Buchanan (1826 – 1901)
|    |    |    |    |    |    |     |   m. 1) Benjamin Franklin German (c.1825 – bef. 1860)
|    |    |    |    |    |    |     |   m. 2) Daniel Bloom (1822 – 1899)
|    |    |    |    |    |    (7.2) Cornelius W. Buchanan (1828 – 1902) & Amy Brittain Lewis (c.1830 – 1906)
|    |    |    |    |    |    (7.3) Elizabeth Furman Buchanan (1829 – 1926) & Napoleon Bonaparte German (1813 – 1856)
|    |    |    |    |    |    (7.4) John Hoppock Buchanan (1830 – 1907)
|    |    |    |    |    |    |     |   m. 1) Elizabeth W. Carkhuff (1833 – 1870)
|    |    |    |    |    |    |     |   m. 2) Editha Bush (1850 – 1923)
|    |    |    |    |    |    (7.5) Harriet Susan Buchanan (1832 – 1885) & John C. Hellier (1828 – 1883)
|    |    |    |    |    |    (7.6) Catherine B. Buchanan (1834 – 1926) & Edward Hellier (1833 – 1906)
|    |    |    |    |    |    (7.7) Euphemia Fanny Buchanan (1836 – 1838)
|    |    |    |    |    |    (7.8) Amy Buchanan (1839 – 1904)
|    |    |    |    |    |    |     |   m. 1) Izer Isaiah G. RAKE (1837 – 1875)
|    |    |    |    |    |    |     |   m. 2) William SWALLOW (1820 – 1908)
|    |    |    |    |    |    (7.9) Margaret Buchanan (1842 – 1917) & Gershom McPherson (1842 – 1906)
|    |    |    |    |    |    (7.10) Peter D. Buchanan (1843 – 1922) & Angeline MOORE (1835 – 1925)
|    |    |    |    |    |    (7.11) George Buchanan (1845 – 1856)
|    |    |    |    |    (6.4) Cornelius Williamson & Mary HOPPOCK of Amwell, Hunterdon, NJ
|    |    |    |    |    |    (7.1) son Williamson (1838 – 1838)
|    |    |    |    |    |    (7.2) Bernice Williamson (1839 – 1864)
|    |    |    |    |    |    (7.3) Asher Voorhees Williamson (1841 – 1926) & Anna Jane Hummer (1842 – 1929)
|    |    |    |    |    |    (7.4) Jacob H. Williamson (1844 – 1906)
|    |    |    |    |    |    (7.5) Cornelius Williamson (1846 – 1915) & Mary J. (c.1842 – )
|    |    |    |    |    |    (7.6) Israel P. Williamson (1850 – 1932)
|    |    |    |    |    (6.6) Sarah Ann Williamson & Samuel Arnwine CARRELL of Amwell, Hunterdon, NJ
|    |    |    |    |    |    (7.1) Sarah Elizabeth Carrell (1838 – 1923) & Alpheus BONHAM (1821 – 1898)
|    |    |    |    |    |    (7.2) Micah Williamson Carrell (1839 – 1899) & Lewis Cline (1826 – 1908)
|    |    |    |    |    |    (7.3) Cornelius Williamson Carrell (c.1840 – c.1840)
|    |    |    |    |    |    (7.4) Mary Ann Carrell (1843 – 1886) & Moses BONHAM (1828 – 1898)
|    |    |    |    |    |    (7.5) Samuel Arnwine Carrell Jr. (1843 – 1911) & Mary Jane Hawk (1833 – 1900)
|    |    |    |    |    |    (7.6) Patience M. Carrell (1844 – bef. 1850)
|    |    |    |    |    |    (7.7) Margaret Arnwine Carrell (1845 – 1928)
|    |    |    |    |    |    (7.8) Asher Williamson Carrell (1848 – 1923) & Elizabeth B. SUTTON (1850 – 1917)
|    |    |    |    |    |    (7.9) Rachel Jane Carrell (1850 – 1933)
|    |    |    |    |    |    (7.10) Elisha Warford Carrell (1851 – 1851)
|    |    |    |    |    (6.7) William W. Williamson & Sarah Young of Amwell & Kingwood, NJ
|    |    |    |    |    |    (7) John William Williamson (1844 – 1930) & Sarah Reed (1849 – 1932)
|    |    |    |    |    |    (7) Joseph Williamson (1847 – 1901) & Matilda MYERS (1851 – 1911)
|    |    |    |    |    |    (7) Sarah Ann Williamson (1849 – )
|    |    |    |    |    |    (7) Moyke Williamson (1855 – 1930)
|    |    |    |    |    |    |     |   m. 1) John K. Shurts (1856 – ~1900)
|    |    |    |    |    |    |     |   m. 2) Erva McLain
|    |    |    |    |    |    (7) Cornelius Williamson (1861 – 1919) & Anna Pernia Bacorn (1877 – 1925)
|    |    |    |    |    |    (7) Peter Williamson (1865 – 1940) & Bertha Alvina Franklin (1868 – 1932)
|    |    |    |    |    |    (7) Theodore H. Williamson (1866 – 1908) & Cora May VanPelt (1878 – 1951)
|    |    |    (4.3) Samuel Williamson & 1) Margaret Grethe DeHart
|    |    |    |    (5.1) William Williamson & Helena Lena Terhune
|    |    |    |    |    (6.3) William Williamson & unknown spouse, of Illinois
|    |    |    |    |    |    (7.1) James H. Williamson (1831 – 1906)
|    |    |    |    (5.2) Cornelius Williamson & 1) Styntje Demott
|    |    |    |    |    (6.1) William Williamson & Jacamintie Jemima Vroom of Ohio
|    |    |    |    |    |    (7.1) Elizabeth Williamson
|    |    |    |    |    (6.6) Cornelius Williamson & Ann Creveling of Raritan Twp., Hunterdon, NJ
|    |    |    |    |    |    (7.1) Jacob C. Williamson (1824 – 1909) & Susan Ewing (1820 – 1892)
|    |    |    |    |    |    (7.2) Charles Williamson (c.1832 – )
|    |    |    |    |    (6.7) Richard Williamson & Catherine Gulick of Delaware & Kingwood Twps, NJ
|    |    |    |    |    |    (7.1) John H. J. Williamson (c.1833 – )
|    |    |    |    |    |    (7.2) Ellen Eleanor Williamson (c.1835 – ) & Thomas Reading Hibbs (c.1836 – )
|    |    |    |    (5.2) Cornelius Williamson & 2) Elizabeth Pittenger
|    |    |    |    |    (6.8) Eliza Williamson & Joseph P. Boss Jr. of Flemington, NJ
|    |    |    |    |    |    (7.1) Peter Boss (1838 – 1917) & Henrietta H. Biddle (1838 – 1924)
|    |    |    |    |    |    (7.2) Abraham Williamson Boss (1842 – 1914) & Helen Marsh Stansbury (1849 – )
|    |    |    |    |    |    (7.3) Emily Boss (c.1842 – ) & Robert B. Hummer
|    |    |    |    |    |    (7.4) A. Victor Boss (c.1848 – 1880)
|    |    |    |    (5.3) Peter Petrus Williamson & 1) Charity Gulick
|    |    |    |    |    (6.2) Gilbert Williamson & 1) Elizabeth Ann ROUNSAVILLE of Ohio
|    |    |    |    |    |    (7.1) Lambert Williamson
|    |    |    |    |    |    (7.2) Mahlon Williamson (1819 – 1905) & Lydia Ford (1833 – 1924)
|    |    |    |    (5.3) Peter Petrus Williamson & 2) Jane Britton
|    |    |    |    |    (6.11) Charity Williamson & Dea. Cornelius MYERS of Delaware, Hunterdon, NJ
|    |    |    |    |    |    (7.1) Sarah Jane Myers (c.1836 – ) & Hiram Stout
|    |    |    |    |    |    (7.2) Ephraim R. Myers (1837 – 1924) & Cornelia A. FOX (1837 – 1910)
|    |    |    |    |    (6.16) Jane Williamson & George C. Vancamp of Lambertville, NJ
|    |    |    |    |    |    (7.1) Thomas Vancamp (c.1856 – )
|    |    |    (4.3) Samuel Williamson & 2) Eleanor Williamson
|    |    |    |    (5.11) Ann Williamson & Andrew McClary
|    |    |    |    |    (6.2) Mary McClary & Elijah Hummel Jr. of Bethlehem Twp., Hunterdon, NJ
|    |    |    |    |    |    (7.1) Silvester Hummel (c.1840 – )
|    |    |    |    |    |    (7.2) Amanda Elizabeth Hummel (c.1846 – )
|    |    |    |    |    |    (7.3) Mary Ellen Hummel (c.1848 – )
|    |    |    |    |    |    (7.4) Amy Rebecca Hummel (c.1850 – )
|    (2.2) William Williamson & Gattelyntye Gulick
|    |    (3.1) Johannis John Williamson & Mary
|    |    |    (4.3) Abraham Williamson & Catharine TenBrooke
|    |    |    |    (5.1) Sarah Williamson & 1) Derrick Richard WILLIAMSON
|    |    |    |    |    (6.5) David Williamson & Catharine Biggs of East Amwell, Hunterdon, NJ
|    |    |    |    |    |    (7.1) Mabelle Williamson (1868 – 1949) & Claude D. RITTENHOUSE (1857 – 1937)
|    |    |    |    (5.2) Abraham TenBrooke Williamson & Penelope Sutphen of Amwell, Hunterdon, NJ
|    |    |    |    |    (6.3) Abraham T. Williamson & Mary Shepherd
|    |    |    |    |    |    (7.1) Katharine Ellen Williamson (c.1852 – )
|    |    |    |    |    |    (7.2) John S. Williamson (1854 – 1914)
|    |    |    |    |    |    |     |   m. 1) Margaret Young Rowland (1855 – 1893)
|    |    |    |    |    |    |     |   m. 2) Ida M. Wert (1870 – 1950)
|    |    |    |    |    |    (7.3) Annie M. T. Williamson (1856 – bef. 1915) & Rev. William C. Stinson (1858 – 1927)
|    (2.3) Peter Williamson & Cornelia JOHNSON
|    |    (3.1) William Elbert Williamson & Ann Antje Voorhees
|    |    |    (4.3) John Williamson & Lucretia Tyson
|    |    |    |    (5.6) Henry Williamson & Lucretia Chamberlain
|    |    |    |    |    (6.1) Mary C. Williamson & Jacob F. Wilson of Amwell, Hunterdon, NJ
|    |    |    |    |    |    (7.1) Sarah Wilson (c.1810 – )
|    (2.7) Jacob Yacobus Williamson & Marya
|    |    (3.7) Garret Williamson & Johanna Breese
|    |    |    (4.7) Garret Williamson & Margaret
|    |    |    |    (5.3) David Henry Williamson & Mary Landis
|    |    |    |    |    (6.2) Rachel Williamson & Dr. Andrew J. Blackwell of Princeton, NJ
|    |    |    |    |    |    (7.1) David W. Blackwell (1880 – 1930)
|    |    |    |    |    |    (7.2) Richard R. Blackwell (1885 – 1971)
|    |    |    |    |    (6.4) Richard Williamson & Mary E. Runkle of East Amwell, Hunterdon, NJ
|    |    |    |    |    |    (7.1) Elizabeth A. Williamson (1890 – )
  1. See “Brothers Peter and Jacobus Williamson” by Perry Streeter, 1999, 2005, published July-Sept 2000 in New Netherland Connections, vol. 5 no. 3. His discussion focuses on the brothers Peter and Jacob who settled in early Sussex Co., rather than brother Cornelius & William who settled in Hunterdon.