What was XXX's child's name?
Valentine Mott
The couple had 9 children: 6 sons, including Alexander Brown Mott (1826-1889), Valentine Mott, Jr. (1822-1854), and Thaddeus P. Mott; and 3 daughters, including Louisa Dunmore Mott, who in 1842 married the surgeon William Holme Van Buren.
Thaddeus P. Mott