I know there were a lot of William's, James's and John's back then and it's hard to keep them straight. I stumbled upon a John Adair in Augusta County, VA who married Elizabeth McKnight on June 11, 1791. I found it in some Augusta, VA records with the main source being the Mormon's Vital Records Index.
Any idea about this John and Elizabeth? I thought he might be William Bozeman's son but another record in GA showed his son John marrying a Jane Jones in GA around that same time and having a daughter named Susanna before his early death.