On 8 Apr 1731 when Isaac was 22, he married Sarah Fuller (44194) , daughter of Nathaniel Fuller (24538) (14 Nov 1687-20 Apr 1750) & Martha Sampson (25 Oct 1689-8 Jun 1770), in Plympton, MA.265 Born on 28 Sep 1712 in Plympton, MA. Sarah died in Plympton, MA, on 21 Jul 1763; she was 50.

Children of Isaac and Sarah, the first born at Plympton, the others at Halifaxx:
    i. Deborah Sturtevant, b. 12 Feb 1731/2;308
    ii. William Sturtevant, b. 9 Oct 1733;
    iii. Martha Sturtevant, b. 18 Nov 1735;
    iv. Sarah Sturtevant, b. 14 Mar 1737;
    v. Isaac Sturtevant, b. 11 Mar 1739;
    vi. Simeon Sturtevant, b. 11 May 1742;
    vii. Samuel Sturtevant, b. 19 Jan 1744;
    viii. Jesse Fuller Sturtevant, b. 27 Mar 1748; and
    ix. Nathaniel Sturtevant, b. 2 Aug 1750.

20 Jan 173[0/]1 Hannah married Jonathan Ripley, son of William Ripley (ca 1668-ca 1720) & Mary Corbison, in Plympton, MA.265 “Jonathan Rippley and Hannah Sturtevant Maried Jenry 20, 1731 by mr Jonathan Parker”. Born 5 Mar 1706/7 in West Bridgewater, MA. Jonathan died on 10 Aug 1772.

On 15 May 1740 when Fear was 21, she married Capt. John Waterman (30591) , son of John Waterman (13326) (23 Sep 1685-8 Jun 1761) & Lydia Cushman (13 Dec 1687-7 Jul 1771), in Halifax, MA.435 Born on 3 Jul 1718 in Plympton, MA. John died in Halifax, MA, on 26 Apr 1790; he was 71.