> Well actually you are not correct that medieval ancestry is impossible to verify using Autosomal DNA. Medieval genealogy *is* impossible using autosomal DNA tests of living individuals. Full Stop. If you have a counter example that countermands basic mathematics, we are excited to hear it. > But leaving that aside for the moment, I am only insulting those people who are claiming to show some ancestry Y-DNA for the Smith family, or the Jones family, when they haven't even done the Autosomal DNA to show that a bastard didn't creep into the line in the past six generations. Everyone understands what you are saying. We just disagree. If I have a man born in 1450 with two sons. And two people with paper trails to each of these sons through the male line have an identical Y-DNA result, it is *evidence* (like all evidence, subject to further query and discovery), that the two men have intact lines as expected. It adds *weight* to the paper trail that the father in question was the father of the two sons. I could take an autosomal DNA test as well to prove recent generations in a line back to this medieval individual, but it tells me nothing of medieval genealogy. > > There are plenty of people who do medieval genealogy who couldn't care less what the Y-DNA tests do or don't show.