Hi Kathy. I was doing some research before a planned trip to Scotland and Ireland on family history, looking for Flack Duffy. My father tells me that his dad's uncle was named Flack Duffy. Do you know if your great grandfather had a brother named Joseph? I have also been told that Flack and Joseph's father's name was Frank. A lot of the same names appear in your message above. I live in Warrick County and my father's family is from a small town very close to Warrick County called Somerville IN.