A Second Butler Big Y Results Are In

I am thankful that Peter agreed to take the Big Y test, also known as the Big Y – 500. It is important when taking the Big Y test to have two people with the same surname. That is because results are achieved in tandem. That means, that to have new SNPs named there has to be someone else that matches you on that SNP. Otherwise, the SNPs that don’t match anyone else remain private.

Previously, I was also happy that Rick tested. He is not a Butler, but previous Y DNA tested indicated that his family and the Butlers were related at some time in the past. Based on YFull calculations that time would be 700 years ago. Even though, that seems like a long time ago, the common ancestor that my father in law, Richard, had before Rick tested was 3500 years ago. I wrote about Rick’s results here.

Peter’s YDNA SNPs at FTDNA

Peter tested at FTDNA. It took a little while to get his results, but when they came in, things happened quickly. Peter’s first results looked like this:

This showed that Peter matched Rick and Richard. This was expected. Not too much later, FTDNA showed that Peter actually formed a new branch with just himself and Richard.

In my opinion, this new SNP of I-Y128364 is likely a Butler-only SNP. This is one of the goals of the Big Y: to get a family surname level SNP. Here is how I see the Butler tree with SNPs:

The age of these common ancestors are from YFull.

Peter’s YDNA SNPs at YFull

Peter uploaded his FTNDA Big Y results to YFull. One would think the results would be the same between the two companies, but not quite so. For one thing, YFull gives age estimates. One is for the formation of the SNP and the other is for the common ancestors of the matches that share that SNP.

Above, Peter is YF14375. His number is faint as the results have not yet been finalized. I am expecting that YFull’s analysis will have Peter and Richard sharing a common SNP, once their analysis is done. Rick has the USA flag and Richard is the last person in the image above.

Some Differences Between FTDNA and YFull: Y128315 Vs Y128591

Under YFull, Y128315 shows three SNPs plus 17 others. One of the 17 others is Y128591:

That means that there were a bunch of SNPs in this group. FTDNA chose one SNP to be representative of the group (Y128591) and YFull picked a different one (Y1285315).

What About I-Y136556?

YFull has an extra SNP between I-S17511 and I-Y128315. This is I-S136556. . This may be because there is an ERS sample at YFull that I believe was taken from a study. This test result would not be included in the FTDNA information. This I-S136556 fills in some information that FTDNA did not have, but the dates are still ancient history as they are in the range of 4,000 to 3,500 years ago. Note above in the YFull Tree that Y136556 is also called BY37214. FTDNA has this listed under S17511:

The bottom line is that YFull shows slightly more detailed branching than FTDNA.

What’s Next?

Next we wait for YFull to finish their analysis. The interesting thing that YFull does that FTDNA does not do are age estimates. It will be interesting to see what YFull has for a date for the common ancestor between Peter and Richard. Also YFull will likely come to the conclusion, as FTDNA did, that Richard and Peter need to share their own Butler SNP.




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