Your maternal Great Grandmother was most likely from BALLINDEREEN which is a village just north of KINVARA. The primary cemetery in the area is DRUMACOO. I have a Great Grandmother who was a CUNNANE. Often translates to CANNON or CONCANNON. Many of these folks came from around ATHENRY in GALWAY. Google the "Tithe Applotment Book" for Galway and Griffith's Valuation. Lots of good info on families there.