| Moncza, Hermann | Hermann Moncza (Hermann Moncza) | Actor | 1920 - 1925 | 3 | |
| Mărculescu, Grigore | Grigore Mărculescu | Actor | 1920 - 1932 | 4 | |
| Mihail Dragomirescu, Laura | Laura Mihail Dragomirescu | Translator | 1920 - 1935 | 6 | |
| Macri-Eftimiu, Agepsina | Agepsina Macri-Eftimiu | Actor | 1920 - 1941 | 12 | |
| Maierhofer, Ferdinand | Ferdinand Maierhofer (Ferdinand Maierhofer) | Actor | 1920 - 1946 | 5 | |
| Miliander, Sven | Sven Miliander (Sven Miliander) | Actor | 1920 - 1952 | 6 | |
| Morgen, Maria | Maria Morgen (Maria Morgen) | Actor | 1921 | 1 | |
| McEntee, Frank | Frank McEntee (Frank McEntee) | Actor, Director | 1921 | 2 | |
| Markstein, Grete | Grete Markstein (Grete Markstein) | Actor | 1921 | 1 | |
| Morgen, Josefa | Josefa Morgen (Josefa Morgen) | Actor | 1921 | 1 | |
| Menzinger, Anton | Anton Menzinger (Anton Menzinger) | Actor | 1921 | 1 | |
| Martens, Alma | Alma Martens (Alma Martens) | Actor | 1921 | 1 | |
| Mirtsch, Senta | Senta Mirtsch (Senta Mirtsch) | Actor | 1921 | 1 | |
| Manon, Ida | Ida Manon (Ida Manon) | Actor | 1921 | 1 | |
| Marchand, Eugen | Eugen Marchand (Eugen Marchand) | Actor | 1921 | 1 | |
| Marstrand, Günther | Günther Marstrand (Günther Marstrand) | Actor | 1921 | 1 | |
| Messiter, Eric | Eric Messiter (Eric Messiter) | Actor | 1921 | 1 | |
| Myron, J. | J. Myron (J. Myron) | Director | 1921 | 1 | |
| Maybury, Edgar | Edgar Maybury | Designer | 1921 | 1 | |
| McCreery, Helen | Helen McCreery | Actor | 1921 | 1 | |
| Manners, T., P. | T. P. Manners | Actor | 1921 | 1 | |
| Mača, Alma | Alma Mača | Actor | 1921 | 1 | |
| Muncis, Jānis | Jānis Muncis | Designer | 1921 | 1 | |
| Mačs, Emils | Emils Mačs | Actor | 1921 | 3 | |
| Marseets, Jānis | Jānis Marseets | Actor | 1921 | 5 | |
| Mitrevics, Augusts | Augusts Mitrevics | Actor | 1921 | 2 | |
| Mann, Max | Max Mann | Actor | 1921 | 1 | |
| Molenaar, Herbert | Herbert Molenaar | Actor | 1921 | 1 | |
| Malenowska, Maria | Maria Malenowska | Actor | 1921 | 2 | |
| Manoliu, Z. | Z. Manoliu | Actor | 1921 | 1 | |
| Muscan, M. | M. Muscan | Actor | 1921 - 1923 | 3 | |
| Mizutani, Yaeko | Yaeko Mizutani (Yaeko Mizutani) | Actor | 1921 - 1924 | 3 | |
| Molander, Gustaf | Gustaf Molander (Gustaf Molander) | Actor | 1921 - 1925 | 2 | |
| Maraval, - | - Maraval (- Maraval) | Actor | 1921 - 1926 | 3 | |
| Melchinger, Alfons | Alfons Melchinger (Alfons Melchinger) | Actor, Director | 1921 - 1927 | 3 | |
| Müller, Paul | Paul Müller | Actor | 1921 - 1928 | 10 | |
| Medenwaldt, Immanuel | Immanuel Medenwaldt (Immanuel Medenwaldt) | Actor | 1921 - 1934 | 5 | |
| Methling, Svend | Svend Methling (Svend Methling) | Actor, Adaptation, Designer, Director | 1921 - 1964 | 9 | |
| Molander, Olof | Olof Molander | Adaptation, Director, Translator | 1921 - 1979 | 5 | |
| 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 | |
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