You are right about those name connections. The major Garner/Vaughn connection that I am aware of is the marriage of Richard Garner to Mary Vaughn in Morgan Co, GA in 1815. A Vaughn man then married one of their children. Richard died at about 40 in 1827 but Mary and the Vaughn brothers and her father moved to Monroe Co/ Pike Co. where Richard and the Vaughns had lottery land grants. Later Mary marries a Revell.
The names continue through the family. Richard's son John P. Garner has a boy named Richard Henry Garner who is my GGrandfather. I can give more details. I am looking for the elder Richard's parents.