I'm a descendant of James Acton (1746-1829 m. Elizabeth McCraft 1764). My Y chromosome DNA markers are here [http://www.ysearch.org/lastname_view.asp?uid=&letter=&am...].
The first 12 markers are identical with those of an individual with surname Acton who is not a descendant of James. He's descended from Henry Acton who emigrated to Maryland from Shropshire around 1700. This strongly suggests that we have a common ancestor in the male line, and that my markers are the same as James.