On 18 Dec 1750 when William was 25, he married Mary Sheldon (11246) , daughter of Ens. Ebenezer Sheldon (1 Mar 1677-18 Mar 1755) & Mary Hunt (3765) (24 Mar 1679-10 Nov 1767), in Northampton, Hampshire County, Massachusetts.151 Born on 8 Dec 1724 in Northampton, Hampshire County, Massachusetts.162 Mary died in Amherst, Hampshire County, Massachusetts, on 10 May 1809; she was 84.151