Name  | Functions | Event Dates | Events | Resources | ||
|---|---|---|---|---|---|---|
| Art Ó Briain (Art Ó Briain) | Director | 1982 | 1 | |||
| Donncha Ó Crualaí | Actor | 2009 | 1 | |||
| Darach Ó Dubháin | Actor | 2009 | 1 | |||
| Séamus Ó hAodha | Actor | 2009 | 1 | |||
| Peadar Ó Treasaigh | Actor | 2009 | 1 | |||
| Pádraic Ó Tuairisc | Actor | 2009 | 1 | |||
| Kristóf Ódor | Actor | 2018 | 1 | |||
| Árpád Ódry (Árpád Ódry) | Actor, Director | 1907 - 1932 | 19 | |||
| Elva Ósk Ólafsdóttir (Elva Ósk Ólafsdóttir) | Actor | 1998 - 2003 | 2 | |||
| Halldís Ólafsdóttír (Halldís Ólafsdóttír) | Actor, Dancer | 2006 - 2011 | 5 | |||
| Margrét Ólafsdóttir | Actor | 1976 | 1 | |||
| Stella Ólafsdóttir | Dancer | 1962 | 1 | |||
| Flosi Ólafsson | Actor | 1975 - 1996 | 2 | |||
| Ólafur Darri Ólafsson | Actor | 2001 - 2008 | 6 | |||
| Ólafur B. Ólafsson | Dancer | 1962 | 1 | |||
| Trausti Ólafsson | Adaptation, Designer, Director, Dramaturg | 2001 - 2012 | 5 | |||
| Ákos Ónodi (Ákos Ónodi) | Actor | 1914 - 1941 | 8 | |||
| Eszter Ónodi | Actor | 2016 - 2019 | 2 | |||
| Halldór Örn Óskarsson | Lighting Designer | 2011 | 1 | |||
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