Have you identified them in the censuses after 1860? My great grandfather x 3 was called James Reilly and born in Ireland. He had my great grandfather x2 Patrick in 1835 and another son James in 1837. I have found James junior up to 1960s census in Lancashire however there the trail goes cold for him. Patrick moved to Sheffield and I wondered if James followed?
Yes I have them going forward, I believe, but I’m not sure they are your line - so many Reilly’s!
If you want to drop me an email with a bit more info, I’ll check my tree and let you know what I have.
Cavan and Roscommon feature quite a bit in the history of my line.