Berthold, Duke of Bavaria

It is known that Berthold was a count in the March of Carinthia in 926 while his elder brother Arnulf the Bad was Bavarian duke.

In 927 German King Henry the Fowler vested him with ducal rights in Carinthia.

When in 938, Arnulf's son and successor Eberhard tried to retain the autonomous status of the Bavarian duchy, he was removed and banished by King Otto I the Great, who appointed Berthold in his place.

Unlike the powerful late duke Arnulf, Berthold was not given the right to appoint bishops or administer royal property, but he remained loyal to the Ottonian dynasty throughout his reign.

In 943, he dealt defeat to the Magyars at the battle of Wels (12 August)[1] and staved off their attacks for a while, as Arnulf had done before him.