Hi Breen Byrne,
Many thanks for the reply. I have to say this site is fantasic when it comes to folks sharing their knowledge and expertise.
I know I'm preaching to the converted when I say that the Irish B, M & D certs do not contain a wealth of information. How dare they not consider future generations

My great grand uncle from Duagh was William Regan. My grandmother had the "deadman's penny" or memorial plaque in his name. I assumed he died in WW1 - he served in the Royal Munster Fusiliers. Turns out he was overcome by fumes in a lime kiln in Rathkeale and died in 1919 while a still a member of the Labour Corps.
Based on your information, I'm satisfied that the 1871 marriage cert I have for Mary Moloney and William Regan means that they are my great x 2 grandparents (hopefully).
You're lucky to have a helpful PP.
I'm hoping to get down to Limerick later in the year - most of ancestors are from the Loghill/Ballyhahill/Shanagolden neck of the woods - so I may take you up on your kind offer of help in advance.
Many thanks,
Sharon