I've never heard the song and I don't know any Irish, but see if these look right, Felipa: https://www.google.com/search?rlz=1C1CHBF_enCA846CA846&ei=rUuzXsqZN9GJgge9i5X4DQ&q=Spailpin+Fanach%2C+boys+of+the+lough+lyrics&o