List of Famous people named Otto

The Knight's Cross of the Iron Cross and its variants were the highest awards in the military and paramilitary forces of Nazi Germany during World War II. The decoration was awarded for a wide range of reasons and across all ranks, from a senior commander for skilled leadership of his troops in battle to a low-ranking soldier for a single act of extreme gallantry. A total of 7,321 awards were made between its first presentation on 30 September 1939 and its last bestowal on 17 June 1945. This number is based on the acceptance by the Association of Knight's Cross Recipients (AKCR). Presentations were made to members of the three military branches of the Wehrmacht—the Heer (Army), Kriegsmarine (Navy) and Luftwaffe —as well as the Waffen-SS, the Reich Labour Service, and the Volkssturm. There were also 43 foreign recipients of the award.

Otto von Botenlauben or Botenlouben, the Count of Henneberg from 1206, was a German minnesinger, Crusader and monastic founder.

Otto Piene was a German-American artist specializing in kinetic and technology-based art, often working collaboratively. He lived and worked in Düsseldorf, Germany; Cambridge, Massachusetts; and Groton, Massachusetts.

Otto Karl Gessler was a liberal German politician during the Weimar Republic. From 1910 until 1914, he was mayor of Regensburg and from 1913 to 1919 mayor of Nuremberg. He served in numerous Weimar cabinets, most notably as Reichswehrminister from 1920 to 1928.

Count Otto Ottoson Vellingk was a Swedish general during the Great Northern War.

Otto Kandler was a German botanist and microbiologist. Until his retirement in 1986 he was professor of botany at the Ludwig Maximilian University of Munich.

Otto Struve was a Russian-American astronomer. In Russian, his name is sometimes given as Otto Lyudvigovich Struve ; however, he spent most of his life and his entire scientific career in the United States. Otto was the descendant of famous astronomers of the Struve family; he was the son of Ludwig Struve, grandson of Otto Wilhelm von Struve and great-grandson of Friedrich Georg Wilhelm von Struve. He was also the nephew of Karl Hermann Struve.

Otto Pendl was an Austrian politician. A member of the Social Democratic Party of Austria, he served in the National Council from 1998 to 2017.