Harmen Yerxa
- Son of William Yerkse and Catrina Sie
- Born about 1767 at Philipsburgh NY
- Married Sara Sie
- Resided at Mount Pleasant NY
- Died 12 December 1828 at Mount Pleasant NY
- Sara Sie was born 5 Nov 1756 in Phillipsburg NY
- Daughter of Isaac Sie (b: 1704 d: 1775) and Eva Fouseur (b:1715 d: 1775)
- Died 6 Feb 1836 at Tarrytown, Westchester County NY
Children of Harmen Yerxa and Sara Sie
- Sarah born 3 March 1791
- Isaac born 14 November 1794
- Jane born 19 October 1796
- John Van Tassel born 25 October 1793
- William born 22 January 1801
- Henry born 17 May 1803
- Lea born 7 March 1811