Conor, I do not think there is a relationship, but Matthew Hehir and Bridget McMahon were sponsors for Mary DILLONon 28th March1839. Mary is the daughter of my great great grandparents Patrick DILLON and Norah MEANEY. They had another daughter Baptised 23 April 1842, Bridget, and her sponsor was Catherine CARBERRY. Their residence was Coolistoonan and the Baptisms were recorded in the Parish of O'Callaghans Mills-Kilkishen. My great grandfather William DILLON was born before the records began or in another parish as I cannot find any records of his birth. I suspect that there was a Michael and a James Dillon who were related but I have not been able to find proof. The McMahons could be related or just close friends.