My ggrandfather, William Duffey(1834-1920), lived in Guernsey County at about the same time as your Duffey's. He was married to Sarah Berry. William's siblings were John b:1828, Martha Ann b:abt. 1837, Isaac b. 1837, James b. 1842 and Thomas b. 1846. From what I know William's parents were William Duffey (b:1805 in Penn.) and Julia Lanning (b: 1802 in Penn. or New Jersey). I was wondering if you kow if my William and your John might be related, and if you've been able to trace the Duffey's further back.