My great-great-great grandparents are Dennis and Honora (O'Brien) Casey. They had a grocery store in Listowel, Ireland and lived in Duagh until about 1849. They moved to Hinsdale, NY. Dennis is thought to be from Killarney. Their daughters Mary and Ellen married two O'Hern brothers. Dennis Casey, Jr. (brother of Mary and Ellen) is my great-great grandfather. I would appreciate sharing information on these families.