Those Lumbee look like they are a real good chunk Native American.
Robeson Co., NC is the most heavily Native American populated county east of the Mississippi as far as I know. Essentially Lumbee are the descendants of the scattered survivors of who knows how many tribes who lost 90-95% of their numbers to disease when the first Europeans arrived.
Lumbee are state recognized but not federally recognized, they had no tribal language and many were living and farming much like the whites who 'found' them. The history that we know is fascinating, but there is much more we do not know.