Charles: A Hartley Second Cousin at 23andMe

I see that 23andMe shows that I have a DNA match with a second cousin twice removed named Charles. After a little snooping around I think I know who it must be.

Charles’ Genealogy

I keep a DNA/Genealogy tree. These are for people that are related to me and have had their DNA tested. Here is part of the Hartley tree that I have so far:

Jennifer is my second cousin once removed. So Charles will be down an extra layer. James Hartley at the top of the tree had 13 children, so the more descendants I can get the better. I believe that Charles is on the Greenwood Line. Greenwood, also known as Green was born in 1897 in Rochester, MA.

Here is where Charles comes in:

It is good to have DNA from a different line because Greenwood, who was born in 1897, had a different mix of DNA passed down to him from his two parents than any of his other siblings. Chrales represents a fourth generation of DNA testers who have descended from James Hartley and Annie Snell.

My DNA Match with Charles

Here is my matches with Charles at 23andMe:

We match on 5 different chromosomes. I can ‘paint’ that match onto my chromosome map. This is what I have already:

I have a paternal side and maternal side for each of my chromosomes. I match Charles on my paternal Hartley side. Charles will paint in as green as that represents our common ancestors James Hartley and Annie Snell. Right now I am 44% painted overall and 54% painted on my paternal side. I have already painted 13 Hartley/Snell descendants. Let’s see if Charles adds anything unique.

Turns out he doesn’t. And it turns out I had already added his DNA to my chromosome map using DNAPainter which is the program that produces the graphic above. I have already mentioned Charles in a Blog here.

Summary and Conclusions

  • I thought I didn’t know where Charles, my DNA match, fit in, but I had figuredĀ  out where Charles fit in before.
  • I now have a note at 23andMe showing where Charles fits in and I have him on my Hartley DNA/genealogy chart.
  • Although Charles could have added new DNA that came down from James Hartley and Annie Snell, he didn’t. That DNA was already covered by twelve other DNA matches who are also descendants of Hartley/Snell.
  • Charles represents a fifth child of Hartley/Snell with DNA matches to me. James Hartley had 13 children. The first child got half of his parents DNA. The second child, combined with the first represented a total of 75% of their parents’ DNA. The third child combined with the first two would have inherited a total of of 87.5% of their parents’ DNA. That means that adding this Greenwood line added a theoretical extra 3% of DNA from James Hartley and Annie Snell.



Leave a Reply

Your email address will not be published. Required fields are marked *