I have hit a brick wall in researching my ancestor, William Issac Adair (1780-1824). He is sometimes confused with a William Irving Adair who was a politician and was around the same age and who was also in Huntsville, AL. My William ISSAC Adair was married to Eleanor Moon. I am trying to back track this Adair line. I believe, William ISSAC's father was James Adair(1757-1831) who was married to Jennie Kilgore, but have no proof.I believe that the prior generation was James Robert Adair(1709-1783) married to Esther McBride, but have no proof. This line seems particularily difficult and I have seen little information prior to William ISSAC Adair. I think they came from SC into KY & TN and them AL. Does anyone have information to share?