> Robert Allen, Jr., (1741-1788) married Jean (Jane) Turk
This family's travels (Ulster -> Augusta Co. -> Shelby Co. KY) are the same as another family (Robert Allen who m. Deborah Montgomery).The families also used similar names (Robert, James, John, Thomas, David) and immigrated perhaps the same year (1736).I wonder if they are related.Specifically I wonder if your Robert Sr was the son of James Allen, brother of the Robert Allen (1695-1769) who married Deborah Montgomery.
Probably there's no hard evidence for such a connection, but perhaps there are clues.
> Nathan Perry Allen (born 1830, my ancestor)
Oh!I've just received e-mail from your cousin Steve Allen (that's why I pursue this query.)