(chancellor) Otto Ender
1930-1931
Duke Otto the Merry
1330-1339
Emperor Karl I (middle name Otto)
1916-1918
King Karel III (middle name Otto)
1916-1918
Tage Reedtz-Thott (middle name Otto)
1894-1897
Otto Liebe
1920
Jens Otto Krag
1962-1968; 1971-1972
(prime minister/state elder) Otto Strandman
1919; 1929-1931
(prime minister) Otto Tief
1944
Otto Flick
1982 'Allo 'Allo!
(chancellor) Otto von Bismarck
1871-1890
King-Emperor Otto I the Great
936-973
King-Emperor Otto II the Red
961-983
King-Emperor Otto III
983-1002
King-Emperor Otto IV
1198-1215
(football) Otto Graham
1965
King Ottó III of Bavaria
1305-1308
King Károly IV (middle name Otto)
1916-1918
Prime Minister Dénes Berinkey (middle name Ottó)
1919
Storm Otto
2004
Hurricane Otto
2010
Hurricane Otto
2016
(chemistry) Otto Wallach
1910
(medicine) Otto Fritz Meyerhof
1922
(chemistry) Heinrich Otto Wieland
1927
(chemistry) Adolf Windaus (middle name Otto)
1928
(medicine) Otto Heinrich Warburg
1931
(medicine) Otto Loewi
1936
(physics) Otto Stern
1943
(chemistry) Otto Hahn
1944
(chemistry) Otto Diels
1950
(chemistry) Ernst Otto Fischer
1973
Otto Blehr
1921-1923
Otto B. Halvorsen
1920-1921; 1923
Otto Wagner
1841-1918
Georg von Rosen (middle name Otto)
1843-1923
Otto Hesselbom
1848-1913
Otto Mueller
1874-1930
Otto Dix
1891-1969
Karl Lagerfeld (middle name Otto)
1933-2019
(football) Otto Graham
1921-2003
(soccer) Otto Rehhagel
1938-
Adolf Eichmann (a.k.a. Otto)
1906-1962
Otto Preminger
1905-1986
Otto von Guericke
1602-1686
Otto Friedrich Müller
1730-1784
Otto Wallach
1847-1931
Otto Diels
1876-1954
Adolf Windaus (middle name Otto)
1876-1959
Otto Hahn
1879-1968
Otto Stern
1888-1969
Olympic Medalists:
4 bronze,
4 silver,
2 gold,
1 bronze/gold,
1 gold/silver,
1 silver/bronze
(silver) Otto Herschmann
1896 swimming - 100 m freestyle
(silver/bronze) Otto Wahle
1900; 1904 swimming - 1500 m freestyle; swimming - 200 m obstacle; swimming - 400 m freestyle
(bronze) Otto Nilsson
1908 javelin throw
(gold) Eric Lemming (middle name Otto)
1908; 1912 javelin throw; javelin throw - freestyle
(silver) Otto Trieloff
1908 medley relay
(bronze) Otto Scheff
1908 swimming - 400 m freestyle
(silver) Otto Fahr
1912 swimming - 100 m backstroke
(silver) Otto Neumann
1928 4x400 m relay
(gold/silver) Otto Cordes
1928; 1932 water polo
(gold) Hans Woellke (middle name Otto)
1936 shot put
(bronze) Ruud van Feggelen (middle name Otto)
1948 water polo
(bronze) Herbert Schade (middle name Otto)
1952 5000 m
(bronze/gold) Ottó Boros
1956; 1960; 1964 water polo
Otto of Greece
1832-1862 Greece
Claus of the Netherlands (middle name Otto)
1980-2002 Netherlands
Saint Otto of Bamberg
1060-1139
Blessed Otto Neururer
1882-1940
Blessed Karl of Austria (middle name Otto)
1887-1922
Otto Stich
1988; 1994
Otto Boffin (m)