I am the co-ordinator of the Allison/Ellison DNA Project with Family Tree DNA. Several participants trace their ancestry back to Lanarkshire, Scotland. There is a family tradition that says that Allisons were part of the Clan Mac Alister several hundred years ago but we lack "paper trail" evidence.
Some of the Allisons in the DNA project have DNA scores very similar to participants in the Hamilton DNA project. Those Hamilton men also have Lanarkshire roots. We know there were marriages between Allison men and Hamilton women in the 1600s and later in Lanarkshire, but that would not account for similar Y-chromosome DNA scores.
Does the ongoing Scottish Clans DNA project have members who are descendants of Clan MacAlister and Clan Hamilton? Is there a similarity in their DNA scores?
Is there a website that shows the results of the Scottish Clans DNA project? We are working on the development of an Allison/Ellison DNA Project Results webpage.