I have a website for a Cain Surname DNA Project handled through Family Tree DNA. It lists the most distant ancestor of each different Cain line and the point of contact. If you are interested the URL is: familytreedna.com/public/Cain-Caine. I am also interested in finding Cain/Caine's from the Isle of Man to participate in the DNA project. I think my line of Cain's may have come from there but need DNA to prove it since the paper trail has ended.