A New Frazer STR Tree with Associated Families

First, I don’t like to make STR trees. They take a while to build and then when the SNP results come out, I can be proven wrong with my previous STR trees. Nonetheless, I’ll forge ahead based on the new 111 STR results from a Frazier relative.

First, Who Are the Associated Families

My understanding is that our Frazer ancestors came to Scotland at some time around the time of Christ. They probably formed a small group of people around the Inverness area. At the time when people were taking on surnames, they probably took on the surnames of the people who were surrounding them at the time. This would likely account for the names of Riley, Hayes, Stuart, Grant and Frazer/Frazier below. There were likely other names adopted. The name of Chisolm comes to mind and perhaps other names that haven’t had YDNA tests.

Building a STR Tree

First I extracted STR results from Frazers and other more distantly related families:

These are 25 STR results for Riley, Hayes, Stuart, Grant and Frazer/Frazier. From this, it appears clearly that a DYS447 of 24 defines Frazer/Frazier and a DYS447 of 25 defines the families above. It appears that the value of 25 is older as there are more of that number and it is applied to three different families.

Without getting into the details, here is a simple tree:

The important thing here is that our most recent Frazier tester falls solidly in with our North Roscommon Frazers.

Further, there is a clear break between Riley and Hayes/Stuart/Grant:

This is just with 25 STR testing.

Frazer and Related Families at 37 STRs

Here is the testing up to 37 STRs:

I took out the markers that were all the same. There was a further distinction I didn’t note above in the first 25 markers that identifies the Archibald line of the North Roscommon Frazers. That is a DYS391 of 11. This is where I was before Richard’s 111 STR results came in. It looked like he was fairly closely related to the Roscommon Ireland Frazers. At the 37 STR level, one of the Stuarts drops out as he only tested to 25 STRs.

111 STRs

At this level, some more families drop out:

There is still one Riley and one Stuart left. In the last column, there was a 16, 17 and 15 for results. In that case, I assumed that the 16 was the ancestral value and that Riley mutated up and Stuart mutated down. I made a similar assumption in the column that had 12, 13 and 14.

It is in the lighter blue 38-111 STRs that Richard shows some of his differences from the North Roscommon Frazers in DYS710, 717 and 712. These are the three markers that appear to put Richard further back as a match with our Roscommon Frazers before they were in Roscommon. Again, the SNP results should give a better idea if this is indeed the case.

This is my best guess for a STR tree:

The big question is whether Richard is under Archibald Frazer or further back as I have it in the above diagram. The main reason for putting Richard’s common ancestor with Archibald Frazer descendants back before the Irish Frazers is that Jonathan’s matches with other known Irish Frazer descendants appears to be closer than with Richard. Here are Jonathan’s STR matches:

Jonathan matches known North Roscommon Frazer descendants at a GD between 1 and 4. He matches Richard at a GD of 7 which is about the same level at which he matches two Stuart descendants.

Summary and Conclusions

  • I built a Frazer STR tree which tries to take into account other related families of Riley, Hayes, Grant and Stuart.
  • Frazier seems solidly in the Frazer camp based on one of the STR markers
  • However, based on genetic distance, it seems like Richard should have a common ancestor with the North Roscommon Frazers at some point before they moved to Ireland.
  • These findings seem consistent with what I looked at in my previoius Blog on Richard’s 111 STR results
  • My guess is that Richard’s BigY SNP results will confirm what appears to be happening with his less reliable STR results


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