** Otto of Paris ( 956 – 965 )

** Otto cycle ( e. g. Gasoline / Petrol engine, high-speed diesel engine )

** Otto of Bamberg

** Otto Soglow

** Otto cycle

** Sylke Otto, German luger

** Otto Stern, German physicist, Nobel Prize laureate ( b. 1888 )

** Otto Harbach, American lyricist and librettist ( b. 1873 )

** Otto Struve, Russian – American astronomer ( b. 1897 )

** Otto Tief, Estonian politician and military commander ( b. 1889 )

** Otto Buchsbaum, Austrian-born writer and ecological activist ( d. 2000 )

** Otto Plath, father of American Poet, Sylvia Plath, and entomologist ( d. 1940 )

** Otto Seeck, German classical historian ( born 1850 )

** Adolf Otto Reinhold Windaus, German chemist, Nobel Prize laureate ( d. 1959 )

** Miranda Otto, Australian actress

** Otto Klemperer, German-born conductor ( b. 1885 )

** Otto Preminger, Austrian-born film director ( b. 1906 )

** The trial against fraudulent art dealer Otto Wacker begins in Berlin.

** Otto Lubarsch, German pathologist ( d. 1933 )

** Otto von Bismarck becomes prime minister of Prussia.

** Constitution of the North German Confederation comes into effect, creating a confederation of states under the leadership of Prussia and Otto von Bismarck.

** Otto Fritz Meyerhof, German-born physician and biochemist, recipient of the Nobel Prize in Physiology or Medicine ( d. 1951 )

** Otto Carius, German tank commander

** Otto Stich, member of the Swiss Federal Council

** Otto Schoetensack, German anthropologist ( d. 1912 )

** Otto Pfleiderer, Development of Theology ( 1890 )

** Otto Pfleiderer, The Development of Theology in Germany since Kant ( 1890 )

** Otto Pfleiderer, Development of Theology ( 1890 )

** Otto Pfleiderer, Development of Theology ( 1890 )

** Iphigenie auf Tauris, play by Johann Wolfgang von Goethe.

** Darstellungen griechischer Dichter auf Vasenbildern ( 1861 )

** Der Hirt auf dem Felsen

** Seven cantatas based on texts taken from Ignazio Silone's novels Bread and Wine and Fontamara for solo voice, strings and woodwind instruments: * Die Römische Kantate, opus 60 ; * Kantate im Exil ( Man lebt von einem Tag zu dem andern ), opus 62 ; * Kantate " Nein " ( Kantate im Exil No. 2 ); * Kantate auf den Tod eines Genossen, opus 64 ; * Kriegskantate, opus 65 ; * Die den Mund auf hatten ; * Die Weißbrotkantate

** Cord Garben ( producer ), James Levine ( conductor ), Agnes Baltsa, Kathleen Battle, Gary Lakes, Hermann Prey, Anna Tomowa-Sintow, & the Vienna Philharmonic Orchestra for R. Strauss: Ariadne auf Naxos

** 1947: Drei Jäger auf dem Meeresgrund ( Three hunters on the sea-bottom )

** Zerbinetta, Ariadne auf Naxos ( Richard Strauss )

** Ariadne, Ariadne auf Naxos ( Richard Strauss )

** The Composer, Ariadne auf Naxos ( Richard Strauss )

** Die Toten Hosen-125 Jahre auf dem Kreuzzug ins Glück

** KGaA ( Kommanditgesellschaft auf Aktien ): ≈ publicly traded partnership ( US )

** Mach das Fenster auf!

** Bohm, Englands Einfluss auf Weckherlin ( Göttingen, 1893 )

** Psychologie in Umrissen auf Grundlage der Erfahrung ( 2nd ed., Leipzig, 1893 );

** Iphigenie auf Tauris