I see your name is Bergin. I have a Mary Bergen (spelled wrong) in my tree, daughter of Harrison Bergen, and Mary Creuse.
Mary Creuse was the daughter of George Creuse and Mary Horan.
Mary Horan was the sister of my mother's great grandmother Josephine Slavin (nee Horan), both Mary and Josephine being daughters of Maurice Horan and Anna Rice.
Does any of this relate to you???