On 24 Aug 1797 when Thaddeus was 52, he married
Elizabeth Cummings, daughter of
Thomas Cummings (29 May 1734-6 Nov 1818) &
Lucy Lawrence (29 Feb 1731/2-28 Oct 1815), in Westford, MA.
Born on 21 Apr 1764. Elizabeth died in Unity, Waldo County, Maine, on 19 Aug 1829; she was 65.