On 3 Nov 1743 when Nathaniel was 25, he married 
Mary Cornwall (53103) , daughter of 
Capt. Wait Cornwall (18 Sep 1692-8 Jan 1742) & 
Mercy Todd (36440) (25 Nov 1692-), in Middletown, CT.
197 Born on 17 Jul 1719 in Middletown, CT. Mary died in Middletown, CT, on 10 Jan 1780; she was 60.
Nathaniel and Mary were second cousins; their paternal grandfathers were brothers.
Children of Nathaniel and Mary (Cornwall) Cornwall, born at Middletown:
    i. Millicent Cornwall, b. 15 Sep 1744, m. Ebenezer Bacon;
    ii. Nathaniel Cornwall, b. 12 Jun 1746, d. 30 Oct 1830;
    iii. Elihu Cornwall, b. 20 Sep 1747, d. 6 Oct 1776;
    iv. Mabel Cornwall, b. , b. 28 Dec 1750, d. 5 Jan 1772;
    v. Mary Cornwall, b. 21 Aug 1753, m. Aaron Plumb;
    vi. Elizabeth Cornwall, b. 23 Apr 1755, m. Joseph Coe;
    vii. David Cornwall, b. 23 May 1757, d. 26 Sep 1776;
    viii. Sarah Cornwall, b. 3 Feb 1759, m. Samuel Savage;
    ix. Lucy Cornwall, b. 5 Dec 1760, m. Nathan Strong;
    x. Abiah Cornwall, b. 18 Feb 1763, m. Benjamin Bacon; and
    vi. Mercy Cornwall, b. 28 Feb 1765, m. Joseph Hall.