After writing that last post, I took a look at the tree I have so far. It appears that William and Mary are my great grandparents. To my knowledge, Mary came here from Ireland after William died. That is why there is no information on him anywhere. I believe he died in Ireland.
My father recently acknowledged that there was another Munley family in Bay City that they didn't know. Perhaps it was yours. Its sounding like that anyway. Did your group originate in PA? I am wondering if that was the source of all the Bay City settlement considering so many Munleys seem to live in that region.