For a long time, my great great grandfather,
Samuel Langston (c. 1830-1879) was our earliest known ancestor, and the use of traditional
methods of genealogy to identify his parents were unavailing. Thanks to DNA testing, however,
we have found our family's place on the larger Langston family tree.
For an account of the DNA testing and an examination
of available evidence in the light of that testing, see this paper and the supporting data: