Apparently, our lines diverged in the 18th century, though that has not lessened my interest in Thrailkill genealogy. For your line (from William Jr.) I have found the following database that include some or all of the names you mention. It's all I know. Good luck. http://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=thrailkill-smithhttp://worldconnect.rootsweb.com/cgi-bin/igm.cgi?db=thrailkill-smith [Be sure to reconnect, without a space, the two halves of this link.] Note that WorldConnect has 1695 listing for Thrailkills.