Mercy, If you supply your grandparents' names and dates, it might give the rest of us a few ideas about how to look for their connection with Arthur Ryan.
A couple of other ideas...
Ryan was likely ordained in Maynooth, so the college archives there may have information on him. Also the church he served in and the diocese he served in might have details. And the local historical society in Tip may be able to assist you.
I hope this helps.