stacyshorts wrote:
My family was devout catholics so I think they resided mostly in northern Ireland but am not quite sure. There were many things that I regret not asking my grandmother before she passed about our relatives there and if there was a certain part we were connected to more than another.Her parents relocated and there family name was McGirl. Hope this may help-stacy
I am sure there are devout catholics in the south too - somewhere - if the Celtic Tiger didn't destroy them.
Someone may be able to trace McGirl regionally.

I found the Irish
Mag Fhearail for it but I think older spelling would have been more like
Mag Fhearghail 
Definitely wait for someone with better resources on that question.
If it does turn out to be the North, I am sure Lughaidh would be only too pleased to give you an Ulster version of the translation and pronunciation, but let's see if the family name doesn't give us some clues first.