Lately I have been reaching out to Nicholson descendants at 23andMe who match me by DNA. The last one that I had identified was Dave and I wrote a Blog about my match with him here.
It turns out that this match is with Cynthia who is Dave’s sister. I didn’t realize that until I just checked. Cynthia’s common matches with me.
Here is how we match. I’ll need to add Cynthia into David’s box on the lower right. Cynthia didn’t know much beyond her Nicholson grandfather. I have more on the Nicholson family here. Here is Walter’s baptismal record from Kensington Presbyterian Church:
Walter is Cynthia’s Nicholson great-grandfather. Walter and his brother George Dockrill Nicholson were both baptized on April 4, 1886 when they were 10 or 11. Cynthia’s grandfather George Dockrill Nicholson was named for Walter’s brother.
My DNA Match with Cynthia
My DNA match with Cynthia is similar to the one I have with her brother David, but larger:
Here is my match with David:
I match David on the same Chromosomes but for less on each Chromosome.
I had added David to my Chromosome map, now I can add Cynthia. Here is Cynthia on Chromosome 8:
My match with Cynthia is represented by the third purple bar. Her match overlaps some with Linda. In order for these people to match me, each of our unique mixes of chromosome inheritances have to match up. David and Cynthia’s DNA matches with me do not overlap with each other
Other people that match me on this Chromosome are Linda, Carolyn, Beth and Robert.
Robert and Beth are the great-grandchildren of Sarah Nicholson, my great-grandmother Annie’s older sister. Linda and Carolyn descend from Nellie Nicholson and David and Cynthia descend from Walter Nicholson. David and
Cynthia also have a 1st cousin Robert, but he tested at AncestryDNA, so he doesn’t have detailed DNA comparison information unless he uploads his results to Gedmatch, MyHeritage or Famly Tree DNA (FTDNA).
My DNA Match with Cynthia on Chromosome 20
We have two copies of each of our chromosomes. Both Cynthia and I match on our maternal copy of our Chromosome 20. That is because that is our Nicholson side.
Chromosome 20 is one of the shorter chromosomes. Judith descends from my closer Lentz and Nicolson ancestors, so she is in a different color. Cynthia’s DNA match with me on this chromosome overlaps my match with David and Carolyn, meaning we all got the same DNA from William Nicholson or his wife Martha Ellis there.
Here is what my maternal chromosomes look like now:
Cynthia brought my maternally mapped DNA up a percentage to 38%. The purple represents DNA from my great-grandmother Annie Nicholson. I have eight great-grandparents, so that represents roughly 12.5% of all of my DNA or 25% of my maternal side DNA. Taking this one step further:
5.5% divided by 12.5% is 44%. That is the amount of DNA from William Nicholson and Martha Ellis that I have mapped now.
I have mapped out by visual phasing where I got my DNA from each of my grandparents on all my chromosome. Here is Chromosome 8:
I am the third person on the chart. All my maternal side (green) DNA came from my maternal grandmother who was a Lentz. However, this is my Nicholson side also as my grandmother’s mother was a Nicholson. That explains why I match Nicholsons well on this Chromosome. My sister Lori has the second most Lentz DNA on the bottom row.
Here is Chromosome 20 for me and my siblings:
Again, I have all green or Lentz. By looking at my siblings’ DNA, you can get a good idea how DNA is inherited differently by each sibling. For example, my sister Sharon would not match Cynthia on this Chromosome as she has a lot of Rathfelder DNA on Chromosome 20. But she may match on another chromosome where I con’t match Cynthia.
23andMe Family Tree
23andMe suggests that I add Cynthia to their tree:
I also added David on the lower left part of the tree.