I just put a file called McLaughlins and Dohertys online. It contains a McGee utility version of the off modal markers, a brief explanation of each surname and a genetic distance tree. This is a 37 marker version. I put this material online because the McLaughlins and Dohertys were both said to descend from sons of Nial c. 450 AD. Can anyone spot anything that might indicate these two families are as closely related within M222 as indicated by their traditional pedigrees? I only see one point in common (DYS 458 = 18). But not all have it. There's also a little overlap in family modal markers in that most McLaughlins have DYS 447= 24 and that is shared by at least some Dohertys. I can't say too much about 458= 18 because it's one of marker values in the project shared by many and not just known descendants of Niall. Some of the Dohertys also have the McLaughlin 576= 17. Almost all Dohertys have YCAIIab= 19-22, a value that does not appear in the McLaughlin samples. I haven't found this combination of markers in many other supposedly Cenel Eoghain or Cenel Conaill families. It seems to be absent almost entirely from the O Cathains and except for one McGovern I haven't seen it much in Connachta septs either. I did find it in a few septs said to come from Donegal including a Devenny, two Donnellys, a Boyle, two Kennedys from Ireland, a Granahan, a common Donegal surname, and a Boyle. According to O'Clery, the Dohertys all descend from a common ancestor c. 1170. The McLaughlins descend from a common ancestor in c. 1220. Note that the sample marked "the O'Doherty" was taken from Pasqal O'Doherty, the brother of the current O'Doherty chieftain, living in Spain since the late 1700s. John