Arnulf, Duke of Bavaria

Arnulf II (birth unknown; died 14 July 937), also known as the Bad (German: der Schlimme), the Evil (der Böse) or the Wicked, a member of the Luitpolding dynasty, held the title of Duke of Bavaria from about 907 until his death in 937. He is numbered in succession to Arnulf of Carinthia, counted as Arnulf I.

Source: Wikipedia — https://en.wikipedia.org/wiki/Arnulf,_Duke_of_Bavaria