Thank you. I know some things, but clearly not enough.
Both my grandparents were Catholic but I don't know which parishes. I do have birth dates, although different censuses list different years. My grandmother was born in a small town in PA and I plan to go there in the fall and visit each Catholic Church. I think they were married in PA in1897 but I don't know the city. I have found my grandfather's grave (In fact I was at his funeral); don't know where my grandmother's grave is.
All g grandparents were born in Ireland, cities of birth unknown. I don't know first names of gg grandparents, although I have some last names. Until I find more info, I don't have enough info to know what to ask for.
Thanks for the info and he encouragement.