Odin (also rendered in English as Wotan) is the chief diety in Norse mythology; according to the entry in Wikipedia,
"Odin (pronounced /ˈoʊdɨn/ from Old Norse Óðinn), is considered the chief god in Norse mythology and the ruler of Asgard. Homologous with the Anglo-Saxon Wōden and the Old High German Wotan, the name is descended from Proto-Germanic *Wōđinaz or *Wōđanaz. "Odin" is generally accepted as the modern English form of the name, although, in some cases, older forms may be used or preferred. His name is related to ōðr, meaning "fury, excitation," besides "mind," or "poetry." His role, like many of the Norse gods, is complex. He is considered a principal member of the Æsir (Norse Pantheon) and is associated with wisdom, war, battle, and death, and also magic, poetry, prophecy, victory, and the hunt."