Jock Mahoney (1919 - 1989)

Kate O’Mara (1939 - 2014)

Patrice O’Neal (1969 - 2011)

Anne O’Neal (1893 - 1971)

Barbara O’Neil (1910 - 1980)

Nance O’Neil (1874 - 1965)

Buck O’Neil (1911 - 2006)

John O’Neill (1952 - 2001)

Eugene O’Neill (1888 - 1953)

Jack O’Neill (1923 - 2017)

Peggy O’Neill (1924 - 1945)

Rosemary O’Reilly (1924 - 2003)

John Boyle O’Reilly (1844 - 1890)

Heather Michele O’Rourke (1975 - 1988)

Heather O’Rourke (1975 - 1988)

Milo O’Shea (1926 - 2013)

Maureen O’Sullivan (1911 - 1998)

Peter O’Toole (1932 - 2013)

Mayrata O’Wisiedo (1930 - 1998)

Jim O Toole (1937 - 1970)

Lane Chandler (1899 - 1972)

Michael Oakeshott (1901 - 1990)

Vivien Oakland (1895 - 1958)

Florence Oakley (1881 - 1956)

Laura Oakley (1879 - 1957)

Florence Oakley (1881 - 1956)

Laura Oakley (1879 - 1957)

Warren Oates (1928 - 1982)

Edward Cole “Eddie” Oatman (1889 - 1973)

Anthony Quinn (1915 - 2001)