List of Famous people named Otto

Carl Julius Otto Liebe was Prime Minister of Denmark 30 March 1920 to 5 April 1920. Otto Liebe was appointed prime minister after King Christian X had dismissed Carl Theodor Zahle and his cabinet, because of dissatisfaction with the amount of land ceded to Denmark in the Schleswig Plebiscite. This use of power by the king, which was based in the Danish constitution, led to the Easter Crisis of 1920, and Otto Liebe was replaced by Michael Pedersen Friis after 5 days. The incident also led to a revision of the Danish constitution later in 1920.

Heinrich Otto Wilhelm Bürger was a German zoologist who specialised in Nemertea. He studied at several universities and at Stazione Zoologica in Naples. He gained his doctorate at the University of Göttingen under Ernst Ehlers. Between 1900–1908 he was Professor and Director of theZoology museum in Santiago de Chile. He later, still in South America, lived as a gentleman scientist, travel writer and economic geographer.

Otto Bache was a Danish Realist painter. Many of his works depict key events in Danish history.

Ludwig Otto Blumenthal was a German mathematician and professor at RWTH Aachen University.