William Mann (1809-1892) and Abigail Cook (1808–1890) had 7 children. Descendants recorded here (so far) are as follows:
- Daughter Mary Sanderson Mann Wilder, husband (Deacon) George Kirk Wilder and their descendants
- Son Horatio who committed suicide in Boston, his wife and at least 1 of his 2 unmarried daughters who were born, raised and remained in Boston
- Daughters Jane and Lydia (unmarried)
- Great granddaughter Rachael Ruth Mann Begor Coolidge