Family Tree DNA has a Brandon surname project, but there is no one tested and I've met no one researching the descendants of John and George Brandon who went to Rowan County, NC.

https://www.familytreedna.com/public/BRANDON/default.aspx?se...

I have been unable to update or correct this tree in several years, but here are your people:
http://familytreemaker.genealogy.com/users/b/r/a/Sally-A-Bra...

Sally Brandon
Coordinator, Lineage I, FTDNA Brandon Project