People — M
Michael O'Raghallaigh
b. 1971
musician
Michael O'Regan
1846 – 1933
military personnel
Michael O'Regan
b. 1947
businessperson
Michael O'Regan
1953 – 2024
journalist
Michael O'Reilly
Catholic priest
Michael O'Reilly
b. 1993
boxer
Michael O'Rielly
b. 1971
civil servant
Michael O'Riordan
1917 – 2006
politician
Michael O'Rourke
1862 – 1882
Gambling
Michael O. Sawyer
1919 – 2002
teacher
Michael O'Shaughnessy
1864 – 1934
hydraulic engineer
Michael O'Shea
1906 – 1973
actor
Michael O'Shea
1947 – 1991
musician
Michael O'Sullivan
b. 1990
hurler
Michael O'Sullivan
1934 – 1971
actor
Michael O'Sullivan
b. 1995
association football player
Michael O'Sullivan
b. 1962
Australian rules football player
Michael O'Sullivan
b. 1973
cricketer
Michael O'Sullivan
2000 – 2025
jockey
Michael O'Sullivan
poet
Michael O'Sullivan
1784 – 1839
politician
Michael O. Thorner
scientist
Michael O'Toole
b. 1971
classical guitarist
Michael O. Tunnell
b. 1950
writer
Michael O. Varhola
b. 1966
designer
Michael O. Wilder
b. 1941
politician
Michael O. Woodburne
b. 1937
geologist
Michael Oakes
b. 1973
association football player
Michael Oakeshott
1901 – 1990
philosopher
Michael Oakley
b. 1982
musician
Michael Oakman-Hunt
b. 1993
rugby union player
Michael Oaten
b. 1961
Australian rules football player
Michael Oatley
1935 – 2026
Michael Obafemi
b. 2000
association football player
Michael Obamina
b. 2003
association football player
Michael Obasuyi
b. 1999
hurdler
Michael Oberlechner
b. 1979
politician
Michael Oberleitner
b. 1966
tennis coach
Michael Obert
b. 1966
journalist
Michael Obiku
b. 1968
association football player
Michael Obiora
b. 1986
writer
Michael Oblowitz
b. 1952
film director
Michael O’Brien
1876 – 1952
Catholic priest
Michael Obst
b. 1955
composer
Michael Obst
b. 1944
coxswain
Michael Occhipinti
guitarist
Michael Ochei
association football player
Michael Ochiltree
Catholic priest
Michael Ochs
1943 – 2025
photographer
Michael Öchsner
1816 – 1893
opinion journalist
Michael Odewale
b. 1995
comedian
Michael Odibe
b. 1988
association football player
Michael Odintsov
1921 – 2011
writer
Michael Odisho
b. 2000
Michael Odogwu Elue
b. 1956
Catholic priest
Michael Oduor
1962 – 1996
athlete
Michael Oenning
b. 1965
association football player
Michael Oesterle
b. 1968
composer
Michael of Cesena
1270 – 1342
regular priest
Michael of Ephesus
1050 – 1129
philosopher
Michael of Glasgow
1001 – 1101
Catholic priest
Michael of Hungary
955 – 990
politician
Michael of Imereti
1250 – 1329
monarch
Michael of Klopsk
monk
Michael of Massa
philosopher
Michael of Ohrid and Macedonia
1912 – 1999
politician
Michael of Synnada
750 – 826
diplomat
Michael of Thessalonica
orator
Michael of Trebizond
1285 – 1355
monarch
Michael of Zahumlje
ruler
Michael Offei
b. 1966
actor
Michael Offer
b. 1901
film director
Michael Óg McFadden
1885 – 1958
politician
Michael Ogbere
Michael Ogburn
b. 1948
association football player
Michael Ogden
1926 – 2003
Michael Ogio
1942 – 2017
politician
Michael Ogungbaro
b. 1996
association football player
Michael Oh
b. 1971
missionary
Michael Ohana
b. 1995
association football player
Michael Ohanu
b. 1998
association football player
Michael Oher
b. 1986
American football player
Michael Ohioze
b. 1995
sprinter
Michael Ohnesorge
b. 1983
association football player
Michael Ohoven
b. 1974
film producer
Michael Oien
b. 1981
composer
Michael Ojo
1993 – 2020
basketball player
Michael Ojo
b. 1989
basketball player
Michael Okantey
b. 1939
sprinter
Michael Okeke
b. 2005
association football player
Michael Okoro Ibe
b. 1995
association football player
Michael Okpala
1939 – 2004
amateur wrestler
Michael Okpara
1920 – 1984
politician
Michael Oku
Michael Okuda
b. 2000
graphic designer
Michael Okwo
b. 1985
American football player
Michael Okyere Baafi
b. 1976
politician
Michael Ola
b. 1988
American football player
Michael Olaha
b. 1997
association football player
Michael Olaitan
b. 1993
association football player