William Cason 1750-1821

I see many family trees for my William Cason listing Cannon Cason and Rosa Whitehurst as his parents, but the William of those parents died in 1840 in Georgia and was married twice, first to Ann Roberts, 2nd to Jeanette Rodgers.
My William was married to Mary Talbot/Talbert and by 1800 was in Ohio territory and died 1821 in Union Co, Indiana. His daughter Elizabeth Cason married Abraham Burkhalter.
Does anyone know anything about the true parents of this William.