On 5 Aug 1787 when Lewis was 23, he first married Lydia Holmes (45011) , daughter of Thomas Holmes (25680) (15 Oct 1720-3 Dec 1792) & Lydia White (38015) (1 Aug 1718-), in Scituate, MA.52 Born on 25 Mar 1760 in Marshfield, MA. Lydia died in Scituate, MA in 1802.52 Buried in Fairview Cemetery, Scituate Center.

On 3 Jan 1805 when Lewis was 40, he second married Thankful Sutton in First Parish Church of Scituate.52 Thankful died in Scituate, MA on 7 Sep 1843.52 Buried in Fairview Cemetery, Scituate Center.

Thankful, the second wife of Lewis Clapp, died age 72 (according to town records) or 78 (according to her gravestone).52

On 5 May 1799 Thomas married Mercy Bailey (49211) , daughter of Benjamin Bailey (32086) (ca 1747-11 Sep 1822) & Mercy Bailey (47837) (ca 1755-), in First Parish Church of Scituate.52 Born on 6 Dec 1779 in Scituate, MA.52 Mercy died on 14 Mar 1831; she was 51.310

Chilren of Thomas and Mercy (Bailey) Clapp, born at Scituate:
    i. Emily Clapp, b. 14 Sep 1799;
    ii. Elijah Clapp, b. 16 Sep 1801;
    iii. Hannah Clapp, b. 9 Oct 1803;
    iv. Lucy Clapp, b. 23 Dec 1805;
    v. Mercy Clapp, b. 22 Jan 1808;
    vi. Howard Clapp, b. 3 Feb 1810;
    vii. Franklin B. Clapp, b. 12 Jul 1812;
    viii. Harvey Clapp, b. 26 Feb 1814;
    ix. Louisa Clapp, b. 24 Mar 1815;
    x. Emily Clapp, b. 23 Jan 1819;
    xi. Harriet Clapp, b. 22 Nov 1821; and
    xii. Thomas Clapp, b. 22 Jan 1824.

On 14 Aug 1803 when Benjamin was 25, he married Judith Otis (48687) , daughter of David Otis (31289) (ca 1747-14 Dec 1828) & Mary Vinal (47845) (2 Dec 1752-10 May 1818), in First Parish Church of Scituate.52 Born on 15 Mar 1782 in Scituate, MA.52 Judith died in Scituate, MA in Aug 1828.310