Did you get any information as to when they may have shown up in the United States or Canada? Any "stories" told that may have a clue? Any family books or pictures or old letters? I started out that way and put my name on a mass email list which served the same purpose as this website. Ironically I was found four years later by a cousin. I had all about given up. Try as many of the free websites as possible. If I come across something with those names, I can send them your way.
I noticed the names on here that you are researching. I have a friend who divorced a Lawlor and they are from MA I believe. His name is Jim Lawlor. I had family in Philadelphia at one time, but they have died or moved on elsewhere. Most of us are in the Allentown, PA area.