Your Levi was most likely the son of Aaron and Hepzibah Crosby Prouty.All the Maine Proutys are descended from Aaron. I find no other possibility from all the censuses and other info, and have included him as a son of Aaron.Levi died relatively young-in 1837 and Lavinia remarried in 1847. She was 40 when Levi died. I do not know Levi's birthday, however. I will send you what I have.