Gahagan Family Genealogy Forum
Didn't ever think I would get a response to my message-what a pleasure to get your note. I have a couple of printed Gahagen/Gahagan published family histories given to me by a friend who traveled in PA. I do not know the author of either one but they are entitled: "Gahagen Ancestry" and "The Gahagen-Gahagan Family". I am sure you will be able to find the same articles in your research-if not let me know and I will have copies made for you. One mentions that Thomas and Jacob migrated to the western part of PA. I will review the articles again and see if the names Anna and Rachel are noted.
Good luck with your research and let me know if I can be of any further help. Still looking for my connection.