On 15 Sep 1766 Isaac married Sarah Andrews, daughter of Caleb Andrews (29 Jul 1716-aft 1790) & Mary Hodges (-29 Mar 1784), in First Congregational Society, New Haven.55 Born on 31 Jul 1741 in New Haven, CT.56 Sarah was baptized in First Congregational Society, New Haven, on 2 Aug 1741.55

Children of Isaac and Sarah (Andrews) Thomas, born at New Haven:56
    i. Sarah Thomas, b 16 Nov 1767;
    ii. Silas Thomas, b. ca. 1769, bp. 4 Nov 1770, died soon;
    iii. Dorcas Thomas, b. 12 Sep 1771;
    iv. Silas Thomas, b. 21 Sep 1773;
    v. Richard Thomas, b. 22 Sep 1775, d. Feb 1835 at New Haven, m. 1st Hannah, m. 2nd at New Haven 2 Jun 1821 Patty (d. 18 May 1831 æ. 56 at New Haven, widow Johnson);
    vi. Susanna Thomas, b. 22 Sep 1775, m. at North Haven 23 Dec 1795 Jacob Thorpe;
    vii. Isaac Thomas, b. 10 Oct 1777, m. at New Haven 21 Oct 1795 Elizabeth Benham (b. ca. 1779, d. 20 Mar 1832 æ. 53 at Hamden, dau. of Joseph & Elizabeth (Bunell) Benham);
    viii. Benjamin Thomas, b. 17 Feb 1779;
    ix. As Thomas, b. 1 Aug 1781, d. 3 Spe 1812, m. at New Haven 7 Mar 1802 Anna Louisa Gilbert (b. 19 Jul 1777 aat New Haven, d. there 14 Jun 1850, dau. of Caleb & Eunice (Bassett) Gilbert); and
    x. Mary Thomas, b. 17 Apr 1784.56

On 9 Feb 1775 Joseph married Anne Hodge in Second Congregational Society, New Haven.55 Born ca 1750.55

Children of Joseph and Anne (Hodge) Thomas,:
    i. Anne Thomas, b. ca. 1776, buried 3 Sep 1803 æ. 27 at New Haven;
    ii. Lucy Thomas, b. ca. 1778, d. 3 Oct 1844 æ. 67 at New Haven, m. Richard Gorham;
    iii. Joseph Thomas;
    iv. Susan Thomas, b. ca. 1784, d. 11 Sep 1863 æ. 79 at New Haven, m. Samuel Short;
    v. Elisha Thomas, b. ca. 1786, d. 11 Jan 1860 æ. 74 at New Haven;
    vi. Eli Thomas; and
    vii. a son, b. ca. 1792, d. 21 Oct 1802 æ. 10 at New Haven.56

On 4 Nov 1774 Mary married Ashbel Beecher (45506) , son of Samuel Beecher (30 Aug 1714-16 Jan 1792) & Mary Thomas (26396) (21 May 1719-aft 1805), in Second Congregational Society, New Haven.55 Born on 5 Apr 1755 in New Haven, CT.56 Ashbel was baptized in Second Congregational Society, New Haven, on 25 May 1755.55

On 12 Jun 1776 Hester married Hiram Beecher (47991) , son of Moses Beecher (2 Feb 1732/3-7 Apr 1800) & Ann Johnson (30116) (5 May 1736-26 Dec 1827), in Congregational Society, East Haven.55 Born in New Haven, CT.