Hallahan/Murray marriage, 1950

Hello, I have searched for ages to figure out where in Waterford my Hallihan relatives may have come from - after paying too much money to use rootsireland.ie, I may have found something which would make it all worthwhile if it is correct.

I found a marriage in Kilgobnet parish, dated 1 Jan 1850, of Patrick Hallahan and Mary Murray - no parents' names given, only witnesses (John Curreen, Anastasia Hanagan), officiated by J. Hynes.

What church would have been in the parish at that time?  Does a Catholic parish translate to one church or multiple churches?  And, does this mean that the bride's family was from there, but not necessarily the groom's, as it usually means in 20th century church records?  which would mean that this doesn't mean the Hallihans were from there, only Mary Murray...

This is the first time I have ever come across a record that is the right time period, the right names, and the right county, so I'm rather excited, and interested to learn whatever I can about the area.  Griffith and the Tithe books aren't helping me too much other than that in 1851 there was a John Murray in Balleighteragh East.  I don't find Patrick Hallahan/Hallihan/Callahan in Kilgobnet in 1851 - he took his wife and baby son to the US in 1854, but perhaps he was not yet head of his own household in 1851.  I did find a "Patrick Callahan" in the area in 1851.