Of German origin.
Associated with Old High Germanic names such as Audo, Odo, Udo and other names beginning with the element “aud”, meaning “wealth”, “fortune”, “prosperity”.
Sources mention the association with the Swedish word “åtta”, meaning eight.
Several kings of Germany were bearers of the name.
Chancellor Otto von Bismarck is considered the most notable German with this given name.
Other forms of the name are Odo, Ottone, Ottorino, Audo.
Feminine forms of the name are Odilia, Odette, Oda, Ute, Auda, etc.
Famous bearers are Otto Preminger, Otto Porter, Otto Waalkes, Otto Sirgo, Otto Hahn, Otto Stern, Otto Klemperer, Otto Rehhagel.