R.C. Bannon had ties to Barbara Mandrell through who?
R.C. Bannon:  He was also married to singer Louise Mandrell from 1979 to 1991, and charted six duets with her in addition to twelve singles of his own. Louise Mandrell:  She is the younger sister of fellow country singer Barbara Mandrell, and older sister of actress Irlene Mandrell.
Louise Mandrell