29 Jan 1718/9 William married Margaret Pratt (11872) , daughter of Jonathan Pratt (20 Mar 1667/8-28 Jun 1728) & Margaret Low (4009) (ca 1666-), in the Second Church of Scituate.52 Born on 1 Dec 1694 in Scituate, MA.52 At the age of 11, Margaret was baptized in the Second Church of Scituate, on 13 Oct 1706.52 Margaret died in Hanover, MA, on 20 Oct 1746; she was 51.

Margaret first married William Curtis, second James House.