From working 4 years with Donnie Blackstone on his South Carolina lines, I think it looks like a North Carolina father and 2 sons moving. In the early 1800s, as land west came under control, many Revolutionary War vets were granted land in Tennessee as a recompense for war service. One particular well-known family were the Cravens of North Carolina. My advice, as Donnie and I did, find the oldest North Carolina Cannon and follow the wills. Even those who died intestate. The intestate estates were usually administered by brothers and sons. You might be able to build a pattern. Also, these old families, as you know, re-used first names through the generations. If you find a GABRIEL in a 1870s generation, he would likely be named for one of his father's brothers or cousins. This occurs even in the female line. A female Cannon naming a son Gabriel