On 8 Nov 1722 James married Mercy Flagg (16648) , daughter of Allen Flagg (6149) (16 May 1665-Nov 1711) & Sarah Ball (21567) (11 Jul 1666-), in Watertown, MA.30 Born on 13 May 1702 in Watertown, MA.30

Children of James and Mercy (Flagg) Whitney, born at Watertown:
    i. Mercy Whitney, b. 5 Sep 1723;
    ii. Abigail Whitney, b. 17 Mar 1725/6;
    iii. Lydia Whitney, bp. 30 Mar 1729;
    iv. Allen Whitney, b. 19 Oct 1731, d. 1736;
    v. Eunice Whitney, b. 3 May 1734, d. 1736;
    vi. Eunice Whitney, b. 9 Jan 1737/8, d. 1740;
    vii. Allen Whitney, b. May 1740, d. Dec 1740; and
    viii. James Whitney, b. 26 Oct 1743.30