On 7 Feb 1769 Josiah married Hannah Cooper (41122) , daughter of Joseph Cooper (21396) (21 Nov 1710-1761) & Jemima Smith (21368) (3 Mar 1711-bef 1761), in New Haven, CT.56 Born on 7 Sep 1740 in New Haven, CT.56

Josiah and Hannah were first cousins. His mother and her father were siblings.