I just came across this post you put up back in 2000 and was wondering if you are still reachable. I have some information about Mary Cregan, my grandmother, who lived in Binghamton, NY and was married to my grandfather, John H. Minehan. She died in 1921 and her death certificate lists her parents as Patrick Cregan and Anna Mangan, both from Co. Clare. This sounds like it could be the same family you are looking for.

Please respond to this if you're monitoring and I can go into more detail.