On 27 Aug 1822 when Eli was 26, he married Marinda Thwing (65421) , daughter of John Thwing (29 Apr 1769-8 Sep 1813) & Susanna Dix (61300) (8 May 1775-30 Jan 1811), in Brighton, MA.635 Born on 14 Oct 1803 in Newton, MA. At the age of 5, Marinda was baptized in Newton, MA, on 9 Jul 1809.212 Marinda died in Brighton, MA, on 20 Jul 1883; she was 79.681

Children of Eli and Marinda (Thwing) Sanderson, born at Brighton:
    i. Charles William Sanderson, b. 26 Aug 1823, d. 13 Mar 1907 at Boston, m. at Brighton 11 Dec 1845 Helen Burnett Fletcher (b. Oct 1825 at Boston);
    ii. Simeon Sanderson, b. 4 Jul 1825, m. 1st at Boston 12 Aug 1851 Mary Colby (or Crowley, b. ca. 1830, d. 13 Jan 1858 at Boston), b. 2nd at Boston 7 Feb 1866 Geogianna Seavey (b. ca. 1837);
    iii. George Sanderson, b. 22 Feb 1827, d. 10 Apr 1828;
    iv. Mary Ann Sanderson, b. 14 Oct 1828, d. 17 Mar 1907 at Boston, m. at Brighton 28 Oct 1852 Thomas Hunt (b. ca 1824 in Massachusetts);
    v. Sarah Ann Sanderson, b. 14 Oct 1828, d. 18 Mar 1902 at Boston, m. at Brighton 1 Sep 1856 Francis Edward Fay (b. ca. 1819, d. 7 Mar 1885 at Boston);
    vi. Abbie Hersey Sanderson, b. 7 Jul 1830, d. 6 Mar 1886 at Minneapolis, Minnesota, m. 21 Sep 1851 at Worcester, MA, James W. George (b. ca. 1830);
    vii. George Thwing Sanderson, b. 27 Sep 1833, m. at Boston 21 Aug 1865 Hannah E. Philbrooks; and
    viii. Sophia Elizabeth Sanderson, b. 12 Oct 1835, d. 30 Jan 1911 at Brooklyn, NY, m. at Brighton 9 Nov 1859 Isaac Hamilton Wood, b. Jun 1825 in Massachusetts).

1880 Federal Census, Boston, Suffolk Co. MA
Roll 561, page 208B
School Street
    Marinda Sanderson, head, 76, keeping house
    George T. Sanderson, son, 46, bar keeper
    Ebenezer W. Thwing, borther, 74, retired broker
    Charlotte T. Coggins, cousin, 71
    Lizzie A. Mcdonald, servant, 18, servant
All were born in Massachusetts as were their parents.