Hi Edward,
I am researching an Andrew Breen and Maurice Breen. They were brothers who grew up on a farm in Glencar, Killorglin, Co Kerry around 1850. I understand their decendants now live in England, Ireland, Wales, New Zealand (my family) and places unknown in America.
I have no idea how close Killarney (your Breen family) is to Glencar (my family) - any idea?
Does this ring any bells with your research?