Hi there. My 4 th great grandparents are John Carroll and Margaret slattery. I believe that their daughter Bridget is the sister of your Thomas.
I cant seem to find any information on Bridget, but that she was born in Ireland and married a Henry Gillett who came to Australia and settled in NSW. There is a whole book about the Gillett line and I have some information, but can't seem to trace much back before John and Margaret. I would be grateful for any information you have of the family.
Do you by any chance know where in Co Tipperay your John Carroll and Margaret Slattery lived? My gggrandfather was Patrick Carroll from the Clonmel area and since they named their first son John b. 1815, I am assuming Patricks father was John. A Walter Slattery was a baptismal sponsor for A Carroll child. Do you have any other family names? Thanks Carol Sherer