List of Famous people named Otto

Otto Eduard Neugebauer was an Austrian-American mathematician and historian of science who became known for his research on the history of astronomy and the other exact sciences as they were practiced in antiquity and the Middle Ages. By studying clay tablets, he discovered that the ancient Babylonians knew much more about mathematics and astronomy than had been previously realized. The National Academy of Sciences has called Neugebauer "the most original and productive scholar of the history of the exact sciences, perhaps of the history of science, of our age."

Otto I was the Margrave of Meissen from 1062 until his death in 1067, and the second Margrave of the family of the counts of Weimar and Orlamünde. He was a younger son of William III of Weimar and Oda, daughter of Thietmar, Margrave of the Saxon Ostmark. He inherited Orlamünde from his father in 1039 and Weimar from his brother William in 1062. He was appointed by the Emperor Henry IV to succeed William in Meissen as well. He became Advocate of the Cathedral of Merseburg in 1066.

Otto Ruge was a Norwegian general. Ruge was Commander-in-chief of the Royal Norwegian Armed Forces after Nazi Germany's assault on Norway in April 1940.

Otto III, Duke of Brunswick-Lüneburg was Prince of Lüneburg from 1330 to 1352.

Otto Laporte was a German-born American physicist who made contributions to quantum mechanics, electromagnetic wave propagation theory, spectroscopy, and fluid dynamics. His name is lent to the Laporte rule in spectroscopy and to the Otto Laporte Award of the American Physical Society.