| Mansfield, Alice | Alice Mansfield (Alice Mansfield) | Actor | 1917 - 1926 | 2 | |
| Markus, Anna | Anna Markus (Anna Markus) | Actor | 1917 | 1 | |
| Marsh, Hilda Esty | Hilda Esty Marsh (Hilda Esty Marsh) | Actor | 1917 | 2 | |
| Malberg, Peter | Peter Malberg (Peter Malberg) | Actor | 1917 | 1 | |
| Malberg, Henrik | Henrik Malberg (Henrik Malberg) | Actor | 1917 - 1948 | 4 | |
| Middelboe, Ingeborg | Ingeborg Middelboe (Ingeborg Middelboe) | Actor | 1917 - 1928 | 2 | |
| Mroczkowski, (?) | (?) Mroczkowski ((?) Mroczkowski) | Actor | 1918 | 1 | |
| Mirecka, E. | E. Mirecka (E. Mirecka) | Actor | 1918 | 1 | |
| Mac, Nila | Nila Mac (Nila Mac) | Actor | 1918 | 1 | |
| Murata, Minoru | Minoru Murata (Minoru Murata) | Actor | 1918 | 1 | |
| Merrall, Mary | Mary Merrall (Mary Merrall) | Actor | 1918 - 1972 | 5 | |
| Moraïtis, Nikos | Nikos Moraïtis (Nikos Moraïtis) | Actor | 1918 | 1 | |
| Mārsietis, Jānis | Jānis Mārsietis (Jānis Mārsietis) | Actor | 1918 - 1939 | 8 | |
| Mullo, - | - Mullo (- Mullo) | Actor | 1919 | 1 | |
| Melvyl, - | - Melvyl (- Melvyl) | Actor | 1919 | 1 | |
| Martini, Mortimer | Mortimer Martini (Mortimer Martini) | Actor | 1920 | 4 | |
| Molnár, József | József Molnár (József Molnár) | Actor | 1920 - 1924 | 2 | |
| Miliander, Sven | Sven Miliander (Sven Miliander) | Actor | 1920 - 1952 | 6 | |
| Martin, Knut | Knut Martin (Knut Martin) | Actor | 1920 | 1 | |
| Mycot, - | - Mycot (- Mycot) | Actor | 1920 | 1 | |
| Mole, Vojeslav | Vojeslav Mole (Vojeslav Mole) | Translator | 1920 - 1923 | 3 | |
| Majthényi, László | László Majthényi (László Majthényi) | Actor, Director | 1919 - 1921 | 3 | |
| Mowinckel, L. | L. Mowinckel (L. Mowinckel) | Musical Director | 1924 | 1 | |
| Messiter, Eric | Eric Messiter (Eric Messiter) | Actor | 1921 | 1 | |
| Myron, J. | J. Myron (J. Myron) | Director | 1921 | 1 | |
| McConnell, Frederic | Frederic McConnell (Frederic McConnell) | Director | 1922 - 1930 | 3 | |
| Merritt, George | George Merritt (George Merritt) | Actor | 1922 - 1925 | 4 | |
| Marvick, Laurentia | Laurentia Marvick (Laurentia Marvick) | Actor | 1922 | 1 | |
| Mickelson, Lawrence T. | Lawrence T. Mickelson (Lawrence T. Mickelson) | Actor | 1922 | 1 | |
| Mathre, Gerhard | Gerhard Mathre (Gerhard Mathre) | Actor | 1922 | 1 | |
| May, Elsbeth | Elsbeth May (Elsbeth May) | Actor | 1922 - 1990 | 3 | |
| Martelli, Arnaldo | Arnaldo Martelli (Arnaldo Martelli) | Actor | 1922 | 3 | |
| Murata, Kikuko | Kikuko Murata (Kikuko Murata) | Actor | 1922 | 1 | |
| Murata, Miyako | Miyako Murata (Miyako Murata) | Actor | 1922 | 1 | |
| Mumdzhiev, K. | K. Mumdzhiev (K. Mumdzhiev) | Actor | 1922 | 1 | |
| Masi, Rossana | Rossana Masi (Rossana Masi) | Actor | 1922 | 1 | |
| Martynov, V. | V. Martynov (V. Martynov) | Designer | 1923 | 1 | |
| Milev, Geo | Geo Milev (Geo Milev) | Translator | 1923 - 1924 | 4 | |
| McMahon, Glenn | Glenn McMahon (Glenn McMahon) | Actor | 1923 | 1 | |
| Metaxa, Antigoni | Antigoni Metaxa (Antigoni Metaxa) | Actor | 1923 | 1 | |
| Morino, Jone | Jone Morino (Jone Morino) | Actor | 1923 - 1929 | 5 | |
| Morino, Maria | Maria Morino (Maria Morino) | Actor | 1923 - 1924 | 2 | |
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