Hello,
I am descended from Michael Callaghan (1815-1873 Dublin) and Bridget Hynes/Hinds (1816-? Dublin). I'm wondering if you have possibly done DNA testing? It might be possible that we could be looking at the same couple/father. As far as I know Michael and Bridget's son John married Mary Rodgers had a couple of children then left Dublin and went to New Jersey, America where they raised more children, lived and died. Its possible your ancestor was a sibling of my John-
If you've done testing please let me know, Smhcicala@gmail.com. I have about 10 kits on various sites all from this family line.
Cheers,
Susan