| Name (3,707) | Functions | Event Dates | Events | Resources |
|---|---|---|---|---|
| Neil O'Malley | Assistant Stage Manager, Stage Manager | 1979 - 1988 | 2 | |
| Norah O'Malley | Actor and Singer, Performer | 1926 - 1931 | 3 | |
| Pauline O'Malley | Actor | 1973 | 1 | |
| Stephen O'Malley | Lighting Operator/Technician | 1975 - 1977 | 2 | |
| Stephen O'Malley | Musician: Guitarist | 2016 | 1 | |
| Tara O'Malley | Actor | 1987 | 1 | |
| Tony O'Malley | Various | 1961 | 1 | |
| Wilma O'Malley | Actor | 1972 | 1 | |
| Liam O'Maonlai | Musical Director, Musician, Performer | 1998 - 2014 | 5 | |
| Alan O'Mara | Actor | 1982 | 1 | |
| Brett O'Mara | Actor, Performer | 1996 - 2003 | 6 | |
| Charles O'Mara | Actor | 1928 - 1933 | 2 | |
| Francis O'Mara | Actor | 1978 | 1 | |
| Gillian O'Mara | Actor | 1996 | 1 | |
| Graham O'Mara | Actor | 2018 | 1 | |
| Jim O'Mara | Actor | 1953 | 1 | |
| Joanne O'Mara | Actor | 1985 - 1996 | 2 | |
| John O'Mara | Musician | 1986 | 1 | |
| Kate O'Mara | Actor | 1964 | 1 | |
| Marnie O'Mara | Assistant to the Director | 2014 | 1 | |
| Peter O'Mara | Musician, Musician: Guitarist | 1980 - 1986 | 3 | |
| Shane O'Mara | Musician, Musician: Guitarist | 1980 - 2010 | 3 | |
| Chris O'May | Lighting Designer | 1980 | 1 | |
| John O'May | Actor, Actor and Singer, Composer, Devisor, Director, Original Director, Performer, Playwright, Producer, Singer, Writer | 1973 - 2025 | 148 | 5 |
| Lindley O'May | Make-up Artist | 2000 | 1 | |
| Bill O'Meara | Director | 1980 | 1 | |
| Brett O'Meara | Actor, Actor and Singer | 1992 - 2024 | 6 | |
| Caroline O'Meara | Actor, Performer | 1999 - 2006 | 2 | |
| David O'Meara | Composer | |||
| Elizabeth O'Meara | Composer, Set and/or Property Maker, Sound Designer | 1955 - 1961 | 4 | |
| Emily O'Meara | Actor, Director, Producer, Sound Operator/Engineer | 2008 | 1 | |
| Fran O'Meara | Actor, Lighting Designer, Lighting Operator/Technician | 1990 - 1993 | 6 | |
| Georgie O'Meara | Actor, Vocalist | 1897 - 1912 | 5 | |
| Ian O'Meara | Actor, Chorus | 1986 | 3 | |
| Myles O'Meara | Actor, Composer, Lyricist, Musician: Guitarist, Vocalist | 1977 - 1979 | 6 | |
| Rick O'Meara | Performer | 2008 | 1 | |
| W O'Meara | Wardrobe Master/Mistress, Wardrobe Mistress | 1949 - 1952 | 2 | |
| Phil O'Meehan | Actor | 2018 | 1 | |
| Gai O'Meley | Actor | 1978 - 1980 | 3 | |
| David O'Mer | Circus Style Performer | 2007 - 2008 | 2 | |
| Maureen O'Moor | Actor | 1933 | 9 | |
| Kathleen O'More | Actor | 1906 | 1 | |
| Paddie O'Neal | Actor | 1981 - 1982 | 1 | |
| William O'Neal | Actor, Performer | 1935 - 1939 | 4 | |
| Alan O'Neil | Actor | 2015 | 1 | |
| Annie O'Neil | Actor | 1986 | 1 | |
| Barry O'Neil | Actor, Singer | 1871 - 1879 | 6 | |
| Berne O'Neil | Singer | 1973 | 1 | |
| Bernice O'Neil | Actor, Performer | 1933 | 5 | |
| Chris O'Neil | Actor | 2018 | 1 | |
| Chrissy O'Neil | Actor, Sound Artist | 1988 | 1 | |
| Colette O'Neil | Actor | 1983 | 1 | |
| Danny O'Neil | Director, Producer | 1954 - 1956 | 13 | |
| Dave O'Neil | Comedian, Compere, Performer, Speaker, Writer | 1993 - 2014 | 26 | |
| Dorothy O'Neil | Actor | 1977 - 1986 | 3 | |
| Duncan O'Neil | Performer | 1995 | 1 | |
| Edward O'Neil | Actor | 1914 | 3 | |
| Gary O'Neil | Costume Designer, Designer, Director, Set Designer | 1970 - 2016 | 23 | |
| Grace O'Neil | Musical Advisor | 1946 | 1 | |
| Ian O'Neil | Actor | 1951 | 1 | |
| J P O'Neil | Actor | |||
| Jackie O'Neil | Actor | 2011 | 1 | |
| Jamie O'Neil | Actor and Singer | 1989 | 1 | |
| Jasper O'Neil | Performer | 2023 | 1 | |
| Joan O'Neil | Actor | 1946 | 1 | |
| Keegan O'Neil | Technician | 2015 | 1 | |
| Ken O'Neil | Assistant Producer, Stage Manager | 1955 | 2 | |
| Kieran O'Neil | Actor | 2006 | 1 | |
| Matthew O'Neil | Sound Designer | 2010 | 1 | |
| Miles O'Neil | Actor, Creator, Director, Performer, Teacher | 2005 - 2021 | 16 | 3 |
| Nance O'Neil | Actor | 1900 | 9 | |
| Nancy O'Neil | Actor | 1932 | 1 | 1 |
| Roisin O'Neil | Actor | 2015 | 1 | |
| Sandra O'Neil | Actor | 1956 | 1 | |
| Stephen O'Neil | Actor and Singer | 2012 | 1 | |
| Terrance O'Neil | Actor | 1964 | 1 | |
| Tony O'Neil | Actor | 1979 | 1 | |
| Trevor O'Neil | Actor | 1983 | 2 | |
| Tristan O'Neil | Actor | 2020 | 1 | |
| W O'Neil | Mechanist | |||
| W O'Neil | Actor | 1866 | 1 | |
| Win O'Neil | Actor, Director, Producer | 1943 - 1946 | 3 | |
| Yvonne O'Neil | Actor | 1966 | 1 | |
| David O'Neile | Choreographer, Dancer | 1984 - 2001 | 8 | |
| Vicki O'Neile | Actor | 1978 | 1 | |
| O'Neill | Vocalist | 1949 | 1 | |
| O'Neill | Actor | 1866 - 1867 | 1 | |
| Aiden O'Neill | Follow Spot Operator | 2007 - 2008 | 1 | |
| Aimee O'Neill | Actor and Singer | 2011 | 1 | |
| Aine O'Neill | Actor | 2012 - 2013 | 3 | |
| Alex O'Neill | Production Coordinator, Stage Crew | 2011 - 2019 | 3 | |
| Andrew O'Neill | Comedian | 2010 - 2011 | 3 | |
| Angie O'Neill | Actor | 1980 - 1981 | 2 | |
| Ani O'Neill | Costume Designer, Visual Artist | 1996 - 2021 | 5 | |
| Ann O'Neill | Actor | 1960 - 1961 | 5 | |
| Anne O'Neill | Actor, Performer | 2005 | 1 | |
| Anne O'Neill | Actor | 1986 - 1987 | 4 | |
| Anne Marie O'Neill | Reviewer | 4 | ||
| Arthur O'Neill | Wardrobe Master/Mistress | |||
| Arthur O'Neill | Actor, Set and/or Property Maker, Technician, Wardrobe Master/Mistress, Wardrobe Mistress | 1957 - 1959 | 5 | |