After getting my DNA tests completed and for the past few years pouring over that data using tools like GEDMatch, and most recently, Genome Mate, I’ve started to accumulate Most Recent Common Ancestors (MRCA) with some of my DNA matches. How to figure those out is another post entirely.
Granted, I don’t have a lot of confirmed MRCAs, yet, but I do have a few. You can use this data to make a chromosome mapping. Genome Mate does this for you in the software, but there is also a web version (seen below) that will do it for you. This will paint all of the segments on your chromosome that match those ancestors. Once you get a lot of confirmed MRCAs, the mapping looks really cool. Mine is getting started.
As you can see, I only have 2 MRCAs confirmed, one on each side. My paternal 3rd-great-grandparents, Michael Troka and Josylna Grabowska and my maternal great-great-grandparents, Carl Last & Augusta Luedtke.
The Troka connection is not yet fully confirmed, but the information we have is pretty solid. The Last connection is confirmed as I’ve matched up family trees with a 3rd cousin I found via a 23andMe match. I have a few more matches in progress that are close to finding information on our MRCA. It can be tough work sometimes, but there is hope of finding all new ancestors.