The William Allen that I have been tracing came out of Lancaster County, S.C. as far as I know. He came with the Montgomery family from that area some some in the 1790's, maybe earlier. There were two William Allens from that county. One settled in Franklin then moved into the gold hills of Lumpkin County, Ga. and then back to Franklin where he died. He might have been kin and probably was but I have been unable to connect him as yet. I know of the families that you are searching and I do wish that I could be of help but I have found no connection thus far.