List of Famous people named Otto

The Grand Master is the holder of the supreme office of the Teutonic Order. It is equivalent to the grand master of other military orders and the superior general in non-military Roman Catholic religious orders. Hochmeister, literally "high master", is only used in reference to the Teutonic Order, as Großmeister is used in German to refer to the leaders of other orders of knighthood.

Otto Graf was a German actor. He appeared in more than 50 films and television shows between 1935 and 1970.

Otto Szász was a Hungarian mathematician who worked on real analysis, in particular on Fourier series. He proved the Müntz–Szász theorem and introduced the Szász–Mirakyan operator. The Hungarian Mathematical and Physical Society awarded him the Julius König prize in 1939.

Otto Mencke was a 17th-century German philosopher and scientist.

Otto Freundlich was a German painter and sculptor of Jewish origin. A part of the first generation of abstract painters in Western art, Freundlich was a great admirer of cubism.