On 1 Mar 1699 when Isaac was 20, he married
Martha Joslin, daughter of
Nathaniel Joslin (12 Jun 1627-8 Apr 1694) &
Sarah King (ca 1632-2 Jul 1706), in Marlboro, MA.
Born on 1 Mar 1669 in Marlboro, MA. Martha died in Marlboro, MA, on 15 Feb 1768; she was 98.