F, b. circa 1758, d. before 16 April 1780
|Father||Samuel Seaman b. 13 Apr 1715, d. b 12 Jun 1781|
|Mother||Martha Willets Valentine b. 18 Nov 1717|
Marmaduke was born circa 1758 in the Town of Oyster Bay, Queens County, Long Island, New York. Marmaduke was not mentioned among her siblings in her father's will. It is assumed he died before the 16th say of the second month 1780.