William, based on his children's names, this would be the son of John,(Moses, Robert),Purser and Susannah Cuthbertson. Moses was born 1785 in NC and died 1864 in (I think), GA.He served in the War of 1812. He married Massy Arnet (White), a Cherokee lady, in TN in 1816. The three children you name were David Cullen Purser, abt 1823, Rebecca Purser, abt 1827, and John A. Purser, abt 1828. A bit of trivia, a sister of Massey, (Morning/Mourning Dove Mansell/Mancil), was an ancestor of Elvis Presley.