I have a Denis Collins, 1843-1908, son of Bartholomew Collins of Reengaroga, Baltimore and Catherine Collins of Ballyally, Baltimore.
I don't have any information about where this Denis Collins lived or who he married. His brother, Timothy got the family land on Reengaroga, so maybe this Denis moved somewhere else in the Baltimore area.
I know there were Sweeneys in this area, as I have some from around Ballymacrown in my tree.
St. Louis, Missouri USA