Alison- Sorry I didn't respond earlier, but I just saw yoyur message on the board. John Joseph Carroll (1828-1886) was married to Ann Hooper and had several children: Ann M.,Rebecca Jane, Carolyn V., Charles Ignatius "Bud", Benjamin and Ada.Looks like he lived his entire life in Saint Mary's County (around Leonardtown).
How have you done in your research? Do you see any link here? Keep me posted.