Elwyn,
These are Catholic parishes I'm reading through in Kilkenny.
According to My 2xGrandfther's (Edward) marriage in LaSalle, IL in 1857, his parents were listed as John Foley and Ellen Cavanagh. Edward had two sons, John and Edward. Edward never married but John had three sons; Edward, John and Robert. That Edward was my grandfather and he had two sons, Robert and James (my father). It seemed they were at least trying to follow a naming tradition. I found a John Foley and Eleanor Kavanagh in Castlecomer parish baptizing a Pat (1813) and John (1815). That's when I started looking for marriages of those two sons and any other sibling/cousins.


These are from Castlecomer and Muckalee parishes. So, James Foley marries Judith Curran in 1835 in Muckalee. In 1839, Judith witnesses with a John Foley the marriages of her (sister or cousin?) in Castlecomer.. Is John a brother or cousin of James? Since Judith got married in Muckalee, you would think if they were sisters Bridget would also have married in Muckalee. So, maybe cousins?
There were only 18 Foley households between Castlecomer (15), Clough and Muckalee around 1850 according to Griffith's valuation. I would think more than a few were related.