Hi Eric and others on this thread. Thanks for your comments. I'm digging into this on the DNA side - have asked all of the dozens of matches my brother and I have to Allen Sage on Ancestry DNA to upload their results to GEDMatch, sadly with little success. That said, I do have three profiles to compare with that are matches to my brother and I (we descend from Allen and his second wife) that go back to Allen and his first wife. I have compared the amount of shared cM between those sharing both parents and those that are 1/2 (only sharing Allen), and find that the amount of shared cM is higher for the former than the latter - not surprising. I also have looked at the three profiles that are on GEDMatch that go back to Allen and his first wife, and indeed, those profiles show some Amer-Indian heritage (<2% level). My brother and I show none. Of course, still the statistics of small numbers - hoping more respond.
In the meantime, I'm wondering if anyone knows why Allen Sage (1751) had moved to Bloomfield NY? And why he was associating with loyalists? He fought on the other "patriot" side during the revolution. Does anyone know if perhaps Elizabeth Westbrook Beacraft and Allen Sage might have been in the same neighborhood/church, which might explain why they get together? Otherwise, it did occur to me that, perhaps if Allen's first wife was in fact associated with the Brant crew in some way, that would explain why he is in the area, rather than staying out further east where he came from originally.