Plunk YDNA – Any Matches? – Part One

My two male cousins, both of whom the original testing was done through, match each other exactly 35 markers to 35 markers.  Ancestry suggested they shared the same common ancestor within one generation.  Since they are both great grandsons of David Brazille Plunk, he is their common male ancestor (they each descended through two different sons of David).  It is my understanding that the mutation rate of Y DNA is fairly slow and is passed from father to son to son to son, etc.

What does this mean?  The father of David Brazille Plunk, David, his sons, grandsons, great grandsons, 2d great grandsons, etc, all share the same DNA.  But, because there are some mutations, as we travel further up the line, there will be some markers on which the sons don’t match.  When I first started this foray into DNA, it was generally said that as long as the differences were not more than 3, the men involved would be descended from the same male at some point.  The matches now are based on percentages.

An example of this would be that if a woman seeking child support from a man that is claiming to not be the father of her child, the Court would require a DNA test.  In that instance, you have the child and the father both tested and if the results come back 99.9%, then that man is considered to be the father of the child.

According to wikipedia, “for the sake of convenience, a generation is measured in 25 years”.

Other than matching each other exactly, the following matches were suggested by

Keen 15 generations (that would be 15 x 25 = 375 years) to the common ancestor.

Rason 22 generations

Beglen 27 generations

White 31 generations

Keen 34 generations

Cicotte 34 generations

Slaterback 35 generations

I contacted all of these matches and with the exception of the 2d man with the Keen surname, they are all of nonparental events (either officially or unofficially adopted).

Even though the first man with the Keen surname above was unofficially adopted, there is that second man with the Keen surname who does not believe he was.  Working with the first Keen’s family, I have not found a connection with that surname to David Brazille Plunk, although there is a Keen family relationship within the Niswonger family.

Also, the first man named Keen had a difference of 3 between his markers and my Plunk markers.  It appears there is a possibility that the first Keen and Plunk may have a common ancestor some 375 years ago, but since neither family knows the surname, we are unable to determine who that common ancestor would be.

In Part Two of this I will talk about the results for the Plunk YDNA from


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