Findings:
- Otto Weininger
- Otto Preminger
- Otto Rahn
- Otto Wallach
- Heinrich Otto Wieland
- Adolf Otto Reinhold Windaus
- Otto Diels
- Otto Stern
- Otto Meyerhof
- Otto Warburg
- Ernst Otto Fischer
- Jens Otto Krag
- Otto the Great
- Otto IV
- Otto von Pack
- Otto engine
- Otto Laferenz
- Otto Eissfeldt
- Otto Eisenschiml
- otto's doll (user)
- otto's bitchydoll (user)
- Otto fuel II
- Otto Jespersen
- Otto Grotewohl
- J. Otto Seibold
- Otto
- Otto Piene
- Otto Cycle
- Nikolaus Otto
- Otto Omicron (user)
- Otto The Wombat (user)
- Otto von Bismarck
- Dr. Otto von Scratchansniff
- Otto Klemperer
- Otto Lilienthal
- otto (user)
- Otto's Malt Shop
- Otto VanDerGroen
- Otto I
- Otto Hahn
- Professor Otto Wichterle
- Otto Reich
- Otto Skorzeny
- Otto von Guericke
- Otto Loewi
- Otto Kretschmer
- Miranda Otto
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