- Mario Gomez -- Marioand
- Marioara Mutk -- Marius Nordal
- Marius Nordheim -- Mark Baranowski
- Mark Barefoot -- Mark Dean's Caldera
- Mark Deaton -- Mark Haines
- Mark Haines -- Mark L. Vaughan
- Mark Lacob -- Mark Niehaus
- Mark Nightingale -- Mark Schuster
- Mark Schwaber -- Mark Twain
- Mark Twain Orchestra -- Marko Lackner
- Marko Laine -- Marlboro Festival Strings
- Marlboro Festival Wind Ensemble -- Maroo
- Maroon -- Marooned