List of Famous people named Otto

Otto Wilhelm Madelung was a German surgeon who was a native of Gotha. His son, physicist Erwin Madelung (1881–1972), discovered the Madelung constant.

Otto IV, Margrave of Brandenburg-Stendal, nicknamed Otto with the arrow was the Margrave of Brandenburg from the House of Ascania from 1266 until his death.

Otto the Mild, Duke of Brunswick-Lüneburg, ruled over the Brunswick part of the duchy.

Otto VI, Margrave of Brandenburg-Salzwedel, nicknamed Otto the Short was a member of the House of Ascania and co-ruler of Brandenburg. He was a son of Margrave Otto III and his wife, Beatrice of Bohemia.

Otto, Duke of Brunswick-Grubenhagen was the fourth and last husband of Joanna I of Naples. He also held the title of Prince of Taranto. His nickname was Otto the Tarantine.

Otto Lechner is an Austrian accordionist.

Otto-Henry, Elector Palatine, a member of the Wittelsbach dynasty was Count Palatine of Palatinate-Neuburg from 1505 to 1559 and prince elector of the Palatinate from 1556 to 1559. He was a son of Rupert, Count Palatine, third son of Philip, Elector Palatine; and of Elizabeth of Bavaria-Landshut, daughter of George of Bavaria.

Otto V, called the Victorious or the Magnanimous, was Duke of Brunswick-Lüneburg and Prince of Lüneburg from 1457 to his death. He shared the principality with his brother, Bernard, until Bernard's death in 1464.

Otto I, Duke of Pomerania was Duke of Pomerania-Stettin.