John married Maria Harsin about 1783. Maria (daughter of Gerrit Harsin and Sarah Kip) was christened on 4 Feb 1758 in New York City, , New York, USA; died on 27 Sep 1817 in Norwalk, Fairfield, Connecticut, USA. [Group Sheet] [Family Chart]

1. Maria Harsin Newkirk was born on 5 Jun 1784; was christened on 20 Jun 1784.
2. Garret Harsin Newkirk was born on 26 Apr 1787; was christened on 13 May 1787; died on 1 Feb 1831 in Norwalk, Fairfield, Connecticut, USA.
3. Blandina Newkirk was born on 16 Jul 1789; was christened on 29 Jul 1789.
4. Coenrad Newkirk was born on 17 Jul 1791; was christened on 7 Aug 1791.
5. Charles Newkirk was born on 12 Sep 1793; was christened on 6 Oct 1793; died before 28 Nov 1796.
6. Peggy Newkirk was born on 17 Nov 1794; was christened on 29 Nov 1794.
7. Charles Newkirk was born on 28 Nov 1796; was christened on 25 Dec 1796.
8. John Newkirk was born on 24 May 1798; was christened on 24 May 1798.
9. Dewitt Newkirk was born on 30 May 1799; was christened on 4 Jun 1799.