Hi Bob! That's great we share a name and a hometown:) I've never had anyone in the family DNA tested because I really am not very familiar with how that works. I just think it's bizarre that while I knew my great grandfather, I have absolutely no recollection of talk of family members such as brothers, sisters etc... not just not from my great grandfather, but my own father never spoke of other Breens either. I just know that he came here from County Fermanagh in 1910 and somehow met and married my great grandmother Margaret Burke, who was born right here in Union NJ. Somewhere I came across an article about a Father Hugh Breen who was a clergyman out of Baltimore, who retired and went back home to Brookboro, so I am wondering if there is any connection there, not much of a difference in their ages, and from Passenger Lists I found out that Hugh's father's name was James just like my great grandfather... it could be a fluke, or it could be something, but I have absolutely no way of knowing!
Thanks for getting in touch with me:) Good luck in your search!