Hi, I am really not sure I know as far back as my great grandfather but I haven't gotten any further than that. I am really just getting started. I just know there are no other people in the area we live in with the last name Gallegher the way we spell it and there are only a few with it spelled any other way. This is really interesting and alot of work!! LOL I really dont have a lot to go on we dont have many family members left to talk to.