Osborne Oakley (1929-35)
(Mr.) W. Oates (1893)
Margaret O'Brien (1925-35)
C. J. O'Byrne (1885)
Terence O'Donoghue (1946-47)
Patricia O'Kane — See Louisa Kerry.
Suzanne O'Keeffe (1975-80)
Max Oldaker (1932-33)
Derek Oldham (1919-22, 1929-30, 1934-35, 1936,
1936-37) Alfred Oldridge (1964-67)
(Master) Willie Oliver (1880)
(Miss) Oliver (1896-97)
Dennis Olsen (1970-71)
Alice Oppitz (1896-99)
Ignatius Orellana (a.m.d., 1893-94)
Hugh Ormond (1916-17)
Jean Ormrod (1954-56)
John O'Rorke (m.d., 1879)
Leonard Osborn (1937-40, 1946-59)
E. G. Osborne (1875-76)
Sean Osborne (1981-82)
Rita Otway (1906-07)
Emmie Owen (1891, 1892-96, 1896-97,
1898-1900) (Mr.) Owen (1901)