- Mödl Martha, Soloist, Soprano
- Molese Michele, Soloist, Tenor
- Molfesis Faidon, Set Designer, Costume Designer
- Molinos Marc, Video projections designer
- Molotsos Emmanuel, Soloist, Bass
- Momirov Ivan, Soloist, Tenor
- Monogeni Anastasia, Soloist, Soprano
- Monsalve Giancarlo, Soloist, Tenor
- Montanaro Carlo, Conductor, Violinist
- Montesantos Theodoros, Conductor
- Monteverdi Claudio
- Moraitis Thodoros, GNO Chorus Member, Bass
- Moraitou Maria, Soloist, Soprano
- Morandi Pier Giorgio, Conductor
- Morandini Patrizia, Soloist, Soprano
- Mordo Renato, Director
- Morfoniou-Komisopoulou Kiki, Soloist, Mezzo-Soprano
- Morianova Sonia, Dancer
- Morris Mark, Dancer, Choreographer, Director
- Mortaki M., Dancer
- Mortimer Vicki, Set and Costume designer
- Moschopoulos Thomas, Director
- Moscona Nicola, Soloist, Bass
- Moshinsky Elijah, Director
- Moșuc Elena, Soloist, Soprano
- Mosxis Nikos, Dancer
- Moulas Georgios, Soloist, Bass
- Moumoulidis Themis, Writer, Director
- Mouriki Aleka, Writer, Translator
- Mousdrakis Nakis, Soloist, Tenor
- Moustaka Athanasia, Soloist, Soprano
- Moutousi Amalia, Actress
- Moutsios Georgios, Actor, Soloist, Baritone
- Moutsiou Maria, Soloist, Soprano
- Moutsiou Sophia, GNO Chorus Member, Soloist
- Mouzenidis Takis (Theodoros), Director
- Mozart Wolfgang-Amadeus, Composer
- Mpastias(Mpastunopulos) Kosths (Aimilios, Konstantinos), Writer and journalist
- Mudryak Maria, Soloist, Soprano
- Mukhamedov Irek, Dancer, Choreographer
- Mumford Peter, Lighting designer
- Muñoz Daniel
- Muratbekova Irina, Soloist, Soprano
- Murauer Herbert, Set and Costume Designer
- Murray John Horton, Soloist, Tenor
- Mussorgsky Modest, Composer, Librettist
- Muzyca Nadia, Dancer
- Mykytenko Οlga, Soloist, Soprano
- Mylona M.
- Myrotheou N., Soloist, Soprano
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