On 1 Sep 1704 Jacob married Mary Ladd (25574) , daughter of Nathaniel Ladd (20 Mar 1651/2-11 Aug 1691) & Elizabeth Gilman (10032) (16 Aug 1661-ca 1732), in Kingston, Rockingham County, New Hampshire. Born on 28 Dec 1682 in Exeter, Rockingham County, New Hampshire. Mary died in Kingston, Rockingham County, New Hampshire, on 27 Apr 1743; she was 60.