There could very well be a connection between Jacobus Davis and Johnathan Davis. Jacobus had three sons according to the 1830 NY census. Of course, they were not named but merely counted. By 1840, the census named all family names in the household, but all three of his sons had moved away by then. I know that George Davis was his youngest son. George was my GGGrandfather. There was a Green family living near Jacobus in the 1840 census. This might provide the link. Thanks for the clues. I will check it out.