Thanks for the help from all of you who took the time and effort to look for Williams parents for me. I think the most likely answer is Richard Hill who died on Jan. 28, 1831 buried in Manaccan and his mother Elizabeth who was buried on Dec. 3, 1826 in Manaccan. The question of Elizabeth's maiden name remains a mystery to me but I don't now think it was Tellam.
Your research has been a huge help for me.
Thanks to Neale1961, amondg, osprey and others who looked into this for me!