- M. Chestnutt -- Mandolin Jack
- Mandolin Orange -- Mark Ameson
- Mark and Ann Savoy -- Mark Sherrill
- Mark Sinnis -- Marty Williams
- Marv Green -- Matt McColley
- Matt McGee -- Mel Parker
- Mel Street -- Michael "Boots" Robinson
- Michael Boren -- Micheal Castaldo
- Micheal Rainwood -- Mike Haralson
- Mike Headrick -- Minnie Murphy
- Minnie Pearl -- Monty Hawkeye Henson
- Monty Holmes -- My Cousin, The Emperor
- My Graveyard Jaw -- Mystic Sister