Shanreagh ... very good point. I have to try to locate certificates where Johanna married John Welch in Beaver Dam, Wisconsin. He also emigrated from Ireland.
Thank you for the great tip on the naming conventions. I'll study that link you provided.
I've been looking at variations of Gerard, anything remotely close with a daughter Johanna and wife Mary. I also saw there are many variations on Mary ... including Maria, Minnie, May, Marie, Molly, Mariae, Maureen, Mollie, Maire, MRY, Mai, MY, May!
Best,
Kyle