Hello, I've only just seen this post so sorry for the late reply. I am Mike Mahon, the (adopted) son of Michael Gerard Mahon (1930-1991) ,and he in turn was the son of Michael Mahon (1885-1970), late of Manor Street in Dublin. My adopted dad's sisters and brothers were Bill, Kathleen and Marie.
I see you were hoping to get in touch with some of your cousins that are still in Ireland, and I am still here in Dublin. I'd be delighted to hear from you and if I can help with any family tree research please let me know.
The Mahons ran the Dunboyne dairy in queen Street in Dublin, and I have some pictures of Michael and Bridget. My aunt Kathleen (who we all called tanty) and aunty Marie (who married Tom Cunningham) are buried in the cemetery in rooskey, Dunboyne. My uncle Bill lived in Andover in England and passed away in 1989.
I believe there are still some Dillon relations in the Dunboyne area.
Mike