| Mashaw, Mark | Mark Mashaw | Actor | 1984 | 1 | |
| Mashiter, Chloe | Chloe Mashiter | Director | 2015 | 1 | |
| Mashkhati, Ahmad | Ahmad Mashkhati | Actor | 2009 | 1 | |
| Masi, Elisa Berti, | Elisa Berti Masi | Actor | 1896 - 1898 | 3 | |
| Masi, Frank | Frank Masi | Designer | 1967 | 1 | |
| Masi, Giuseppe, | Giuseppe Masi | Actor | 1898 - 1909 | 5 | |
| Masi, N., | N. Masi | Actor | 1892 - 1894 | 13 | |
| Masi, Rossana, | Rossana Masi | Actor | 1922 | 1 | |
| Masini, Antonella | Antonella Masini | Actor | 1999 | 1 | |
| Masini, Ilaria | Ilaria Masini | Actor | 1999 | 1 | |
| Maskell, Robert | Robert Maskell | Actor | 2002 | 1 | |
| Maškova, M. | M. Maškova | Actor | 2002 | 1 | |
| Mašková, Vĕra | Vĕra Mašková | Dramaturg | 1995 | 1 | |
| Mašković, Frano | Frano Mašković | Actor | 2021 | 1 | |
| Masliah, Laurence | Laurence Masliah | Actor | 2003 | 6 | |
| Maślińska, Irena | Irena Maślińska | Actor | 1975 | 1 | |
| Maslo, Arthur | Arthur Maslo | Actor | 1997 | 4 | |
| Maslon, Laurence | Laurence Maslon | Dramaturg | 1985 - 1995 | 3 | |
| Maslov, V. | V. Maslov | Actor | 1970 | 1 | |
| Masłowski, Stanisław, M. | Stanisław M. Masłowski | Actor | 1959 | 1 | |
| Masó, Gustavo | Gustavo Masó | Actor | 2016 | 1 | |
| Mason, Bim | Bim Mason | Actor | 1972 | 1 | |
| Mason, Chad | Chad Mason | Actor, Musical Director | 2001 | 6 | |
| Mason, Dan, | Dan Mason | Actor | 1996 - 2013 | 3 | |
| Mason, David | David Mason | Actor | 1963 | 2 | |
| Mason, John, | John Mason | Actor | 1904 | 1 | |
| Mason, Karla | Karla Mason | Actor | 1996 | 1 | |
| Mason, Kathleen | Kathleen Mason | Actor | 1947 | 1 | |
| Mason, Margery | Margery Mason | Actor | 1973 | 1 | |
| Mason, Marsha | Marsha Mason | Actor | 1973 | 1 | |
| Mason, Marshall K. | Marshall K. Mason | Director | 2001 | 2 | |
| Mason, Marshall W. | Marshall W. Mason | Director, Lighting Designer | 1964 - 1973 | 2 | |
| Mason, Patrick | Patrick Mason | Director | 1988 | 1 | |
| Mason, Paul | Paul Mason | Actor | 1986 | 1 | |
| Mason, Pauline | Pauline Mason | Actor | 1962 | 1 | |
| Mason, Richard | Richard Mason | Designer | 1964 | 1 | |
| Mason, Robin | Robin Mason | Musician | 2004 | 5 | |
| Mason, Roger | Roger Mason | Actor | 1976 | 1 | |
| Mason, Tony | Tony Mason | Lighting Designer | 2005 | 1 | |
| Mason, William C., | William C. Mason (William C. Mason) | Actor | 1906 - 1926 | 5 | |
| Mason. Tessa | Tessa Mason | Actor | 2016 | 1 | |
| Måsøval, Kjersti | Kjersti Måsøval | Actor | 2004 | 1 | |
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