My descent is from John COULTER of Co. Tyrone, who married a CULBERTSON, thru William (1783-1865), Robert (1812-80), Matilda (1847-1924), Frank Roy STUART (1866-1936) and my father Nevil Frank (1913-68). William COULTER had a brother John, said to have emigrated to USA in 1820 and been lost to William's sight. Brian Umbarger has posted an enormous genealogy on Ancestry World Tree claiming descendants of the younger John, who was apparently born in Adams Co. Pennsylvania in 1780, including a son Joseph Hill COULTER (1816-81).
My question to Jane Peyrouse, descendant of Joseph Hill Coulter: what is the evidence for the parentage of John COULTER born 1780?