Well, that solves half a tangle with Roan Mountain, progress. The Bear Family liner notes/site are just a mess –

“Who was/is Roy Hall?
The next significant thing was that James Faye became 'Roy' sometime around 1945 or 1946. "About then," he told me, "I worked some around Roanoke, Virginia with some other boys, and we were the Hall Brothers. That was my first professional band really." He didn't specifically say so, but the brothers were probably banjoist Clayton Hall and his brother Saford, who played fiddle. The brothers had formerly worked with their older brother, Roy, as part of Roy Hall's Blue Ridge Entertainers, firstly out of South Carolina and latterly in and around the Virginias. They had recorded on Vocalion and Bluebird in the late 1930s and early 1940s. When guitarist Roy Hall died in an auto wreck in 1943, his brothers continued playing with a number of other musicians including, it seems, James Faye Hall.”

I think we're getting closer to James Faye Hall not being related to Roy, Clayton or Safford but still replacing Roy in The Blue Ridge Entertainers and/or The (other) Hall Brothers c.1943.