My great great grandfather was Thomas Brannagan who married Roseann Gormley. Their children were born in Larnarkshire Scotland however, I have not been able to discover where they were born. Their grandson (my grandfather Thomas Brannagan) was born in 1889 in Lanarkshire so the timing is right although the spelling slightly different. Do you have any info about your Thomas's children. My great grandfather was John Brannagan. I don't know where he was born either. He married Margaret Lochran and was living in Lanarkshire when my grandfather was born.I thought the family was originally from Mayo but that is oral history and I might be misremembering.