On 6 Dec 1750 when Seth was 23, he married
Rebecca Vinton (51919) , daughter of
Samuel Vinton (35019) (3 mar 1694/5-17 Jul 1756) &
Elizabeth French (14 Mar 1698/9-31 Mar 1770), in Braintree, MA.
Born on 15 Aug 1729 in Braintree, MA. Rebecca died in Randolph, MA, on 22 Sep 1801; she was 72.