| Mirtsch, Senta, | Senta Mirtsch | Actor | 1921 | 1 | |
| Manon, Ida, | Ida Manon | Actor | 1921 | 1 | |
| Melchinger, Alfons, | Alfons Melchinger | Actor, Director | 1921 | 3 | |
| Marchand, Eugen, | Eugen Marchand | Actor | 1921 | 1 | |
| Marstrand, Günther, | Günther Marstrand | Actor | 1921 | 1 | |
| Messiter, Eric, | Eric Messiter | Actor | 1921 | 1 | |
| Myron, J., | J. Myron | Director | 1921 | 1 | |
| Molander, Olof | Olof Molander | Adaptation, Director, Translator | 1921 | 5 | |
| 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 | |
| Maierhofer, Ferdinand, | Ferdinand Maierhofer | Actor | 1920 – 1947 | 5 | |
| Mihail Dragomirescu, Laura | Laura Mihail Dragomirescu | Translator | 1920 – 1935 | 6 | |
| Macri-Eftimiu, Agepsina | Agepsina Macri-Eftimiu | Actor | 1920 – 1932 | 12 | |
| Mărculescu, Grigore | Grigore Mărculescu | Actor | 1920 – 1932 | 4 | |
| Moncza, Hermann, | Hermann Moncza | Actor | 1920 – 1931 | 3 | |
| Muscan, Gr. | Gr. Muscan | Actor | 1920 – 1922 | 4 | |
| Minichini, I., | I. Minichini | Actor | 1920 | 1 | |
| Minichini, S., | S. Minichini | Actor | 1920 | 1 | |
| Minichini, M., | M. Minichini | Actor | 1920 | 1 | |
| May, Gustav, | Gustav May | Actor | 1920 | 1 | |
| Maschke, Gretel, | Gretel Maschke | Actor | 1920 | 1 | |
| Metge, Leni, | Leni Metge | Actor | 1920 | 1 | |
| Martini, Mortimer, | Mortimer Martini | Actor | 1920 | 4 | |
| Molnár, József, | József Molnár | Actor | 1920 | 2 | |
| Miliander, Sven, | Sven Miliander | Actor | 1920 | 6 | |
| Martin, Knut, | Knut Martin | Actor | 1920 | 1 | |
| Mycot, -, | - Mycot | Actor | 1920 | 1 | |
| Mole, Vojeslav, | Vojeslav Mole | Translator | 1920 | 3 | |
| Martinec, Miloš | Miloš Martinec | Actor | 1920 | 1 | |
| Mansfeld, František (Otto) | František (Otto) Mansfeld | Actor | 1920 | 1 | |
| Morris, Leland, C. | Leland C. Morris | Actor | 1920 | 1 | |
| Molnár, János | János Molnár | Actor | 1920 | 3 | |
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