On 26 Dec 1799 when William was 26, he married Sarah Joyce (49142) , daughter of John Joyce (46808) (22 Nov 1733-) & Faith Stephens (31990) (ca 1737-2 Jan 1793), in Marshfield, MA. Born on 12 Jun 1775 in Marshfield, MA. Sarah died in Marshfield, MA, on 30 Oct 1865; she was 90.

Deaths in Marshfield
Sarah Kent, d. 30 Oct 1865 æ. 90 y 4 m 18 d, at Marshfield, widow, b. Marshfield, daughter of John & Faith Joyce (both b. Marshfield), d. of infirmaties of age