Hi Kerry,
There is probably no direct connection. My great grandfather came to Massachusetts from Cork in 1872 and is somehow related to a Buckley and a Sheehan who were already here. Michael J. Cronin, my great-grandfather, and his wife, Mary Purtell, lived at 23 Gilabbey Street before emigrating. There seem to have been a lot of Cronins and Buckleys in Cork!
I am searching my DNA matches in the 4th to 6th cousin range for any likely Cork matches.
Kathy