Clarence, Yes, you see Christopher Gist and Aaron Gist to the best of all knowledge are brothers. And Thomas O. Gist is one of their sons. I beleive he is son of Christopher - but others beleive he is son of Aaron. It was widely believed that his father was Christopher until a death certificate for Sarah, second wife of Thomas O. Gist surfaced. This death certificate's questions were answered by an almost 90 year old Thomas upon his wife's death. He gives her parents as Christopher Gist and Sarah McNutt - but then the Sarah is crossed off. History and gene. classes have taught me that a death certificate can be quite an incorrect document because of the distraught for the family members (much less a husband who is almost 90 years old!) and that sometimes family members aren't even the ones giving the info! I would love to share info with you. If you'd like, contact me directly at PJack_1@ charter.net I will stick with Christopher being father to Thomas O. Gist - with an open mind of course, until proven otherwise.