Cornelius married Esther Van Buskirk on 13 Dec 1807. Esther (daughter of Martin Van Buskirk and Mariah Van Ness) was born on 15 Mar 1787 in Washington Co., New York; died on 24 Aug 1857 in Rensselaer Co., New York; was buried in Buskirk, Rensselaer, New York. [Group Sheet]

1. John Jacob Fort was born on 9 Aug 1808 in Schaghticoke, Rensselaer, New York; and died.
2. Helen Maria Fort was born on 17 Jul 1811 in Schaghticoke, Rensselaer, New York; died on 7 Sep 1869; was buried in Buskirk, Rensselaer, New York.
3. Martin Fort was born in Jun 1815 in Tiashoke (Buskirk), Rensselaer, New York; and died.
4. Philip Van Ness Fort was born about 1823 in Clinton Co., New York; died on 28 Aug 1881 in Rensselaer Co., New York; was buried in Buskirk, Rensselaer, New York.