I'm trying to get some information on the various Callaghans that lived in the Marlfield/Clonmel area circa the 1860s-1870s. I have an ancestor named Johanna Callaghan that was born to parents Innocent Callaghan and his wife Johanna back in 1869. Although Innocent is not a common name, I'm having some problems pulling together the various bits of info I've found online. If anyone can add any insight to my current research stumbling blocks noted below, I'd appreciate it.
1) What is Rathkeevin (e.g., a townland, parish, street, etc)? My ancestor's address is noted as being Rathreevan on one of the records I ordered, and Rathkeevin seemed like the closest match per Google, but there isn't much info about the place.
2) What RC cemeteries are located in the Marlfield/Clonmel area? I've come across Shanrahan as a possible site where my ancestors are buried, but that's about it so far.
3) The baptisms for the Callaghan children seem to have occurred in a Powerstown Parish. Some websites refer to this parish as being in Tipperary and other note that it was changed to Waterford at some point. Does anyone know when/if this occurred?
4) Does the use of Callaghan versus O'Callaghan indicate different families, or was this just a common confusion of the time with regard to record-keeping or self-identification?