- O'Brien
-
Tomothy (1949 - 2004)
- O'Connor
-
James (1905 - 1960)
- O'Donovan
-
Ann A (1924 - )Beatrice Mary (1888 - 1919)Florence Ellen (1895 - 1972)Laura Kathleen (1890 - 1951)Margaret Honorah (1897 - )Mary Beatrice Honore (1919 - 1996)Patrick (1854 - 1923)Patrick A C (1918 - )Patrick Henry (1900 - 1977)William James (1886 - 1955)
- O'Kelly
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James Horace (1923 - 2005)
- O'Leary
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Frances R K (1907 - 1998)Rowena Kathleen (1907 - 1998)
- O'Neill
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Bernard Edward (1921 - 1983)Lorraine Jean (1930 - 2010)Stanley James (1927 - 2001)William James (1896 - 1956)
- O'Regan
- O'Reilly
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Dennis Joseph (1917 - 1999)Gerald Hamilton M (1912 - 2001)Kenneth (1951 - 1986)Lucy Eileen W (1914 - 1989)Michael (1949 - 1949)Michael Douglas (1910 - 1976)Michael Douglas (1942 - 2004)Michael Joseph (1877 - 1918)Nellie Winifred (1908 - 1992)
- O'Riordan
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William Joseph (1907 - 1972)
- O'Rourke
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Terence Percival (1921 - 1978)
- O'Sullivan
- Oakden
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Lily Louisa (1884 - 1923)
- Oakey
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Harriett (1840 - 1875)Willim Arthur (1911 - 1998)
- Oakley
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Henry (1879 - )
- Oakshatt
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Emma Mary Ann (1854 - 1904)
- Obee
-
Reuben Albert (1925 - 1987)
- Ockwell
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Graham (1939 - 2019)Henry Frank (1903 - 1996)