Name  | Functions | Event Dates | Events | Resources | ||
|---|---|---|---|---|---|---|
| Montserrat Ontiveros | Actor | 2006 | 2 | |||
| Per Onsum | Actor | 1962 - 1965 | 4 | |||
| Kari Onstad | Actor | 1976 - 2018 | 60 | 6 | ||
| Ole Onsøjen | Musical Director | 1906 | 1 | |||
| Michael Onslow | Actor | 1999 | 30 | |||
| Alexander Onslow | Actor | 1932 | 1 | |||
| Maren K. Onsaker | Actor | 1998 | 2 | |||
| Mr. Onorato | Actor | 1893 | 2 | |||
| Stefano Onofri | Actor | 1991 | 1 | |||
| Shuji Onodera | Director | 2013 | 1 | |||
| Y. Ono | Dramaturg | 2008 - 2009 | 3 | |||
| Toshiaki Ono | Actor | 2018 | 1 | |||
| Tetsushi Ono | Actor | 2009 | 1 | |||
| Shihoriko Ono | Actor | 1914 | 1 | |||
| Mizuho Ono | Actor | 1997 | 1 | |||
| Miyakichi Ono | Actor | 1925 | 1 | |||
| Masutaro Ono | Actor | 1913 | 1 | |||
| Hacchaku Ono | Dramaturg | 2009 | 3 | |||
| Rie Ono Seo | Lighting Designer | 2009 - 2010 | 2 | |||
| Ferdinand Onno | Actor | 1904 - 1938 | 9 | |||
| Valeria Onnis | Costume Designer | 2012 | 2 | |||
| Yoko Onizawa | Sound Designer | 1996 | 1 | |||
| Ayaka Onishi | Actor | 2018 | 2 | |||
| Akane Onishi | Actor | 2010 | 1 | |||
| Laurian Oniga | Designer | 1985 | 3 | |||
| Gust Ongyerth | Director | 1940 | 1 | |||
| Beverley Ongota | Actor | 2011 | 1 | 1 | ||
| Warwick Ongley | Director | 1969 | 1 | |||
| Zsuzsanna Ongjerth | Actor | 1960 | 1 | |||
| Richárd Ongjerth | Actor | 1960 | 1 | |||
| Elvira Onetto | Actor | 2009 - 2011 | 13 | 1 | ||
| Arvid Ones | Actor, Director | 1983 - 2004 | 22 | 1 | ||
| Andrei Onegin | Designer | 2009 | 1 | |||
| Pavel Ondruch | Director | 2016 | 1 | |||
| Antonín Ondříček | Actor | 1948 | 1 | 1 | ||
| Bibiana Ondrejková | Actor | 1999 | 1 | 1 | ||
| Peter Ondrášek | Actor | 2011 | 1 | |||
| Danuše Ondráčková | Actor | 1984 | 2 | |||
| Tilde Ondra | Actor | 1932 | 1 | |||
| Otto Ondra | Actor | 1989 | 1 | |||
| - Ondra | Actor | 1928 | 1 | |||
| Chris Ondeck | Actor | 2020 | 1 | |||