Findings:
- Otto Lilienthal
- Jens Otto Krag
- Otto Stern
- Otto Diels
- Adolf Otto Reinhold Windaus
- Heinrich Otto Wieland
- Otto Wallach
- Otto Rahn
- Otto Preminger
- Otto Meyerhof
- Miranda Otto
- Otto Kretschmer
- Otto Loewi
- Otto von Guericke
- Otto Skorzeny
- Otto Reich
- Professor Otto Wichterle
- Otto Hahn
- Otto von Pack
- Otto Jespersen
- Otto fuel II
- otto's bitchydoll (user)
- otto's doll (user)
- Otto Eisenschiml
- Otto Eissfeldt
- Otto Laferenz
- Otto engine
- Otto I
- Otto IV
- Otto the Great
- Otto Weininger
- Ernst Otto Fischer
- Otto Warburg
- Gustav Eckstein
- Gustav von Wangenheim
- Gustav Schwarzenegger
- Gustav Ludwig Hertz
- Gustav Kirchoff
- Gustav Fechner
- Gustav Vasa
- Gustav Freytag
- Gustav Richter
- gustav (user)
- Gustav Stickley
- Gustav Stresemann
- Gustav Klimt
- Gustave Doré
- Gustav Holst
- Gustav III
- Gustav Mahler
- otto (user)
- 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 Grotewohl
- Otto's Malt Shop
- Otto VanDerGroen
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