I'm not sure if this has any relevance, but I'll offer it just in case it helps:
My Grandfather was Francis Paul McGraw, b. 4 June 1909, d. 6 March 1994 in Glasgow. He was a Coppersmith. His father was Hugh McGraw; Mother Caroline McGraw, formerly Shades m.s. Edson.
They weren't R.C. though. All Protestants.
Let me know if you need any more info -
all the best - Jim