If your family was all split up then good chance he may not have fathered your line. They say only 35% fall under the Jefferson/Hemmingway situation.
I agree with you to follow all leads and get the best documentation you can find
Collins is a known melungeon surname but it is also a common surname and could be anything.
Byrd and Stanley when did they get added to the Melungeon surname list?
I have ties to the Stanley family and Im related to the Byrds and never have I seen them addressed with the people who were called melungeon in records. People have added names to the list because they feel the need to belong to something. Why they do this????????