I know Maureen and Breda O'Shea very well, but I think they call you Mike rather than Michael. I love looking up family trees etc and Maureen has often said that their father's cousin is big into tracing relations as well! Glengarriff is a very small place. I think you are the person they are talking about.
I am related to the O'Shea Báns and the O'Sheas, Toureen but I don't think I am related to your O'Shea's even though when you mention Earneen, my great-great-grandmother was O'Shea from Earneen! So you never know!
Talk again soon.
Julie