Otto

Later German form of Audo, originally a short form of various names beginning with the Old Frankish element aud, Old High German ot meaning "wealth, fortune". This was the name of a 9th-century king of the West Franks (name usually spelled as Odo). This was also the name of four kings of Germany, starting in the 10th century with Otto I, the first Holy Roman Emperor, known as Otto the Great. Saint Otto of Bamberg was a 12th-century missionary to Pomerania. The name was also borne by a 19th-century king of Greece, originally from Bavaria. Another notable bearer was the German chancellor Otto von Bismarck (1815-1898).