One of the sponsors at the baptism of my great grandmother in Tuam was Bridget Healy. Not your ancestor though as dates don't fit. My ancestor was Mary Ann Rabbit baptised in the Work House on 8th July 1855, she was the daughter of Peter Rabbit and Bridget Acton. Nli Catholic Parish Registers microfilm 04222/01 page 110.
I wonder if your ancestor was related to mine? My brother Martin Taylor and I have both had DNA tests and uploaded the files to GEDMatch. I manage both kits. My kit number is T942828, Martin's kit number is T 756971.