I think you may have cracked the Bridget Hemmi question Gaffy! It has to be her!
Can you please link
... I recently discovered my Grandfather; John O'Donnell born 1902 in Carrick on Suir ...
Funnily enough, that is the one birth registration that I haven't yet found in Carrick on Suir.
I've found a transcript of what I suspect is a baptism for John, he was baptised in the RC parish of Trinity Without (15 miles SE of Carrick on Suir in Waterford City) on 8 June 1902, parents listed as Thomas O'Donnell and Ellen Curran of Philip Street, the sponsors were John Forristal and Margaret Kerins. I still can't see a civil birth registration, so I'm wondering if Thomas and Ellen were just visiting someone in the city or otherwise there temporarily and the civil birth registration for John got forgotten about in returning home to Carrick on Suir?
I can also see transcripts of baptisms for Patrick (1900) and Bridget (1904), the one for Bridget is important, for it sits well with the civil birth registration for Bridget Byrne (that I posted above at Reply #1) in all but surname. In the transcript, she was recorded as Brigid O'Donnell, baptised in Carrick on Suir RC parish on 18 September 1904, the address given as Town Wall, parents Thomas O'Donnell and Ellen Curran, sponsors James and Eliza Cunningham.
So baptised O'Donnell and registered as Byrne. Hmmm...
Can you please put the link for Johns Baptism because I can't seem to find it anywhere and the same for Bridget and Patrick that you found please??