Hi Marvin If my info is correct, I am descended in an all-female line from Rose down to my mother, which means I inherited mitochondrial DNA (mtDNA) & possibly X chromosome or other DNA from her.I'm interested in finding other descendants & looking for matching DNA.If you know of all-female descendants of John & Elizabeth Bayles of Northumberland Co. VA, OR of Elizabeth's maternal ancestors, I can compare with them to see if we match mtDNA.If so it may confirm that hypothesis.If we match via X DNA, it won't absolutely confirm the hypothesis (without more investigation), but will make it very likely.If any other person descended from Rose in an all-female line matches me, that will confirm there are no errors in our documentation, and will validate any further investigations.
For a valid mtDNA comparison, all descendants down to the testee's mother must be female, though the actual testee can be male or female (since only females pass mtDNA to their children). For a comparison of X chromosomes, the descendancy requirement is less strict.
Also, if you or other descendants test with either www.23andMe.com or with FTDNA's Family Finder test, it is possible we may identify autosomal DNA (not X, Y, or mtDNA) that originated with these people.But this is a long shot, since autosomal DNA is diluted in half with each generation, still it remains possible.
I'd be glad to talk more about this with anyone interested.