[c mediumvioletred] (as used in expressions)
Dix Otto
Graham Otto Everett Jr.
Hahn Otto
Jansen Cornelius Otto
Jespersen Jens Otto Harry
Klemperer Otto
Kuusinen Otto Vilhelm
Liman von Sanders Otto
Meyerhof Otto
Otto III
Otto IV
Otto of Brunswick
Otto I
{{link=Otto the Great">Otto the Great
Otto Nikolaus August
Otto Rudolf
Preminger Otto Ludwig
Rank Otto
Otto Rosenfeld
Strasser Gregor and Strasser Otto
Struve Otto
Wagner Otto
Warburg Otto Heinrich
Wieland Heinrich Otto