Hello,
My name is Peter Cronin, and I just started to research my family history and came across this post. We are definitely related. John David Cronin is my Great Grandfather and Michael Cronin is my Great Great Grandfather. I do have a full up to date family tree from John David Cronin to the present. Margaret Creed passed away at a young age and John David re-married to Mary Anne Fogarty. I also have this branch, although I do not have contact. Pls send me an e-mail at peter.cronin@am.kwe.com I look forward to hearing from you