Maria may be Samuel's daughter with Liddie Mitchell. There is a young girl with Samuel and Liddie in the 1810 census. A Maria Seward (between 16 and 25 in 1820) married Squire Duit (Dewitt) April 13, 1818 in Franklin Co, IN. She is mentioned in the settlement of Samuel's estate.
Samuel Seward, Sr.has the weakest proofs in the chain of descendants of Obadiah. All evidence collected to date indicates that he's the son of Obadiah Seward III. He was born in New Jersey @ 1736. We do not know the name of his first wife, but she was probably the mother of all his children except for Maria Seward Duit (Dewitt). Zebedee Billiter, his son-in law, was bondsman at his marriage to Liddy Mitchell.
Samuel Sr. purchased property in Bracken County, KY in March 1798 - 92 acres on the banks of the Ohio River - from Edward Salts and Hugh Marshall (Bracken County Deed Book A, pp. 29-32).
A good share of his family came to live in the same general area. The names, spouses and geographical locations listed at the top come from the documents surrounding the settlement of Samuel Seward Sr.'s estate (1815 and later)