I have a total of 10 people that match on chromosome 17 with the same starting position. The segment lengths are 9.84 to 113.89. I have two known family groups represented. My uncle and I are one known match. The other group is a man, his mother and his known 2nd cousin. The other people in the group have no known connection so far. Everyone is a non X match. If everyone had been an X match it would have helped narrow down which line it could be. When all 10 are put in a Matrix everyone matches everyone else except one person matches everyone else but one. This is an almost perfect Matrix. Here is the graphic sans names.
This tells me that all 10 have the same common ancestor. Now here comes the problem. After looking at everyone’s trees (the ones that have trees) no connection is found. This actually narrows it down a bit more because I only have a couple of lines that I don’t have back far enough that it should pick up the match. The other people are in the same boat. They can’t find a match to each other.
So here is my brilliant idea. I created a group on BYU’s Relative Finder for all of the matches. A couple already have FamilySearch logins but they don’t have themselves linked into the Family Tree. Once I get everyone inputted, we MIGHT find the match this way. If we do we will still need to prove the relationships up our individual chains but it is a start.
The bonus for me is that if I figure out who the common ancestor is, I can assign this segment of chromosome 17 to this ancestor. If anyone else ends up matching me on this segment, and they pass the matrix test, I will immediately know the ancestor. They have to pass the matrix test because everyone has TWO chromosome 17s. All of the above match the chromosome 17 that came from my father, not my mother. How do I know? One of the matches is my PATERNAL uncle. If a new person is added to FTDNA that matches me on this segment I will have to make sure that they are matching me on the paternal chromosome 17 and not my maternal one.
Copyright © 2016 Michèle Simmons Lewis