People — J
John O'Halloran
researcher
John O'Hanlon
1821 – 1905
poet
John O'Hanlon
1889 – 1920
John O'Hanlon
1876 – 1960
chess player
John O'Hanlon
1872 – 1956
politician
John O'Hara
b. 1962
musician
John O'Hara
1944 – 1992
American football coach
John O'Hara
b. 1959
association football player
John O'Hara
b. 1981
association football player
John O'Hara
1905 – 1970
columnist
John O'Hara
b. 1961
lawyer
John O'Hara
1913 – 1983
wrestler
John O'Hare
b. 1962
actor
John O'Hare
1905 – 1970
association football player
John O'Hare
b. 1946
association football player
John O'Hart
1824 – 1902
historian
John O. Henes
1852 – 1923
inventor
John O'Heyne
1648 – 1713
historian
John O. Hodges
1831 – 1897
businessperson
John O'Hurley
b. 1954
actor
John O. Isaacs
1920 – 2001
military flight engineer
John O. Johnson
1875 – 1963
inventor
John O. Jones
b. 1940
politician
John O'Kane
b. 1974
association football player
John O'Kane Murray
1847 – 1885
writer
John O'Keefe
b. 1939
neurologist
John O'Keefe
b. 1940
playwright
John O'Keefe
1880 – 1942
politician
John O'Keefe
1827 – 1877
politician
John O'Keeffe
1795 – 1838
painter
John O'Keeffe
1747 – 1833
actor
John O'Keeffe
b. 1943
Australian rules football player
John O'Keeffe
b. 1951
Gaelic football player
John O'Keeffe
1925 – 2021
Gaelic football player
John O'Keeffe
b. 1988
hurler
John O'Keeffe
1895 – 1973
hurler
John O. Lancaster
1919 – 2019
aircraft pilot
John O'Leary
1947 – 2005
diplomat
John O'Leary
b. 1954
American football player
John O'Leary
b. 1961
Gaelic football player
John O'Leary
1949 – 2020
golfer
John O'Leary
b. 2000
journalist
John O'Leary
1830 – 1907
journalist
John O'Leary
1933 – 2015
politician
John O'Leary
1894 – 1959
politician
John O'Leary
1880 – 1967
sport shooter
John O. Limb
engineer
John O'Loughlin
b. 1989
Gaelic football player
John O. Lyle
John Ó Madadhan
John O Mahoney
Gaelic football player
John O'Mahony
1937 – 2012
Gaelic football player
John O'Mahony
b. 1931
Australian rules football player
John O'Mahony
1953 – 2024
politician
John O'Mahony
1815 – 1877
revolutionary
John O'Malley
1927 – 2022
Catholic priest
John O'Malley
1878 – 1940
politician
John O'Mara
b. 1947
association football player
John O'May
actor
John O'Meally
1939 – 2024
judge
John O'Meally
1841 – 1863
John O'Meara
1856 – 1904
politician
John O. Merritt
John O. Meusebach
1812 – 1897
politician
John O'Mill
1915 – 2005
poet
John O. Miner
1910 – 1999
military officer
John O. Mitchell
1862 – 1921
politician
John O'Molony
1591 – 1651
John O'Molony
1617 – 1702
John O'More
Anglican priest
John O'Neal
politician
John O'Neal
b. 1841
John O'Neil
1920 – 2012
baseball player
John O'Neil
b. 1971
association football player
John O'Neil
1915 – 2004
painter
John O'Neil
1937 – 2016
rugby league player
John O'Neil
1898 – 1950
rugby union player
John O'Neill
1935 – 2012
association football player
John O'Neill
b. 1966
John O'Neill, 1st Viscount O'Neill
1740 – 1798
politician
John O'Neill, 3rd Viscount O'Neill
1780 – 1855
politician
John O'Neill
b. 1958
association football player
John O'Neill
b. 1974
association football player
John O'Neill
1935 – 2024
Australian rules football player
John O'Neill
1873 – 1943
baseball player
John O'Neill
b. 1951
business executive
John O'Neill
1768 – 1838
businessperson
John O'Neill
b. 1968
field hockey player
John O'Neill
b. 1951
functionary
John O'Neill
b. 1957
guitarist
John O'Neill
b. 1990
hurler
John O'Neill
b. 1946
military officer
John O'Neill
1897 – 1942
military personnel
John O'Neill
1834 – 1878
military personnel
John O'Neill
b. 1956
philosopher
John O'Neill
b. 1777
playwright
John O'Neill
politician
John O'Neill
1822 – 1905
politician
John O'Neill
1830 – 1914
politician
John O'Neill
politician