Good God! I never thought I'd find a link to this family!
Martin Nevin was the brother of Michael Nevin, my Great Grandfather. His daughter, my grandmother, is still living and, although she was born after Martin's death, she did meet with his daughter. And Martin's father!
There are some discrepencies with what I've been told and with what you appear to have been told, however. Would you like to contact me away from a public message board...?
PS the Nevins were originally from Galway, and the Mearas are from, predictably, Toomevara. Needles in haystacks there, though.
Re: your other query, I presume you've found Martin Nevin's grave by now - it's a war services grave that was erected a few years back. Never heard of his wife being in there with him, though. Certainly a brother and sister in law are, though. Said brother has a son who - I think - is still alive also. He was named after Martin.
Really hope to make contact with you.
Regards,
Stephen