There is a genetic project or two going on, or was. Clues in behavior and speech, too. Sort of restless, moved a lot outside of their, what, strongholds in VA, TN and NC? Not sure if that’s the right word. So-called “shovel teeth” are a physical trait, claiming to be “Black Dutch” or “Portugee” would be a linguistic clue.
I’ve got a few genealogical lines with strong ties to the group, most notably Sizemore.