From the History of Warren County, Ohio, there is one mention of a James Dunn. In an election for Representatives, James received 994 votes. In the Same book: "Thomas Dunn, of Virginia, of German descent, born 11 June 1772, came to Portsmouth in 1803, and setled east of Fort Ancient in 1812; he was a wheelwright and a farmer and had five sons and seven daughters." Don't know if these are your Dunn's, but hope it is of some help. Vickie