Hello, Jerry, Nice to see your post. As a matter of fact, there hasn't been much discussion recently about this beyond Brenden's mentions at the time his df85/df97 positives were confirmed. When I did the report for Brenden I brought forth a portion of John McLaughlin's discussion mostly to demonstrate that the two surnames were historically linked rather than be too involved in the discussion of the genealogies, etc. John had done some work on the matter, and I suppose for sentimental reasons I chose a portion of his discussion that has mention of others in addition to the McDevitt. He brought in the O'Cleary genealogies and the 1197 Annals. What was requested of me was to compare results as we have them. In short, I look at this work I undertake as seeing without bias what the YDNA haplotypes within the same sub-clade tell us, and in this case they tell us with this set of haplotypes that the TMRCA is supportive of what the histories say as to timing of the McDevitt - O'Dochartaigh common ancestor. In regard to that, a common ancestor for these O'Dochartaigh and the McDevitt together would be an ancestor of Daibhidh Ó Dochartaigh. The very interesting aspect of this analyses is that the TMRCA of the McDevitt in the 37 marker format comes in with a top of the bell curve TMRCA commensurate with 1200 CE and a time when Daibhidh Ó Dochartaigh lived. Additionally, a TMRCA of certain McDevitt and O'Dochartaigh haplotypes plus comparison of the base haplotypes echo the 1200 CE information, while as a set, with in the margin of that date...using the margin of error between 900 & 1300 CE. The R-M222 panel of the Doherty groups are very well represented in numbers and they now have 3 positive df85/df97 results (at the time this was completed, there were 2) and 1 negative df85. The McDevitt haven't the number of results as the Doherty groups but among the total of 10 R-M222 results, 5 are in the 67 marker format, and as mentioned they also have a positive df85/97. I spent some time in the report discussing the need for a evenly weighted set and why it is important in analyses like this in addition for the absolute requirement that we attempt to be in the same sub-clade--in this case df97. Susan