Hi Colleenlit. I can't help find the cemeteries - found just a tiny percentage of my own ancestors graves - but in clicking on your tree it seems we're a DNA match! Morrisroe/Coffey/Towey/Jordan clans ring any bells?
McCanns often appear in some of the same townlands, Killadangan among them. I also found an 1871 marriage between a James McCann and Bridget Morrisroe