Jacobus Yerxa
- Son of Johannes Yerkse and Susanna Foseur
- Born about 1747 at Philipsburgh NY
- Christened 3 May 1747
- Maried Aeltje (Letty) Yerxa (his first cousin) 5 September 1774
- Resided at Mount Pleasant NY
- Died 1807
- Aeltje (Letty) Yerxa was born about 1757
- Daughter of William Yerkse and Catrina Sie
Children of Jacobus Yerxa and Aeltje (Letty) Yerxa
- John D. born 6 May 1775
- Catharina born 15 July 1777
- William J. born 30 November 1779
- Peter born 1781
- Susanna born 1783
- Mary born 10 May 1785
- Elizabeth "Betsy" born 2 October 1786
- Isaac born 12 March 1794
- James born 4 January 1802