I may have replied to you before, if I have please excuse repeat.
In your email, dated 1 December 2012, you mentioned that your grandmother was Marianne whose maiden name was O'Connell and whose father was Denis O'Connell Marianne was my grandmother as well, she married Daniel Kavanagh and lived in Coolmore Churchtown County Cork. Marianne and Daniel had 10 children 3 of whom died at birth. Of the surviving 7 (6 sons and one daughter) two were priests, the only daughter never married,
2 sons emigrated to America where one was killed in WW1. Two sons i.e. my Dad and the youngest Arthur married. Arthur did not have any children. Is it possible that Marianne was your Great Grandmother and not your Grandmother ?. That might solve the mystery. I have a rough family tree made out
which I could send you if I had your email address. I dont think that I can send attachments on this site.
Regards Patrick Arthur Kavanagh