Looking for Family Connections

Hello,

I am looking for any information that might help me connect with family members of Nicholas Finn of Ballyglass, County Mayo. According to his marriage certificate, he was the son of Edward Finn and Honora (nee unknown). Nicholas was born circa 1827 and emigrated to Massachusetts in 1849. He died during the American Civil War in 1864.

Any tips or leads would be greatly appreciated.