"I think the Airghialla-1 modal is associated with Clan Colla and Null-425, right? Many of these people have tested positive for the new DF21 SNP under L21. See "Group N1" in the list from the DF21 project:http://www.familytreedna.com/public/R-DF21/default.aspx?section=yresults" Steve, Thanks for pointing that out. Yes, I have labeled both of the two members as "Clan Colla Airghialla-1." They both have that 9-0-22 configuration around the so-called Null 425. Paul