Timothy Sheehan m. Julia Kilnane (Kilrayne?)

My gr-gr-grandparents supposedly came from Ballyvourney, Cork. They cameto the USA, to Massachusetts, sometime around 1860 and settled in Newburyport. They may have stayed with friends or relatives in Salem, MA prior to moving to Newburyport. He was Timothy Sheehan and she was Julia, whose last name has appeared in many variations -- Kilnane or Kilrayne are the most common, but someone told me that it might be Callaghan. Timothy's death certificate says that his mother was a Foley, and Julia's father was Daniel Kilnane/Kilrayne/etc.

Their children were Patrick, Mary (m. John Lynch, perhaps in Ireland), John (my gr-grandfather), Daniel C., Cornelius, Timothy, and Julia, in birth order to the best of my knowledge. I do not know if there were more children who stayed behind in Ireland.

Would anyone have information that might help us determine if Ballyvourney is the right place or origin for this family? Would you know of family connections there?

Thank you!