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Chlothachar later made his son Dagobert I king of Austrasia, which he ruled with the help of his adviser Arnulf. Pepin of Landen, became the Mayor of the Palace. In 624 Pepin and Arnulf encouraged Dagobert in the murder of Chrodoald, an important leader of the Frankish Agilolfings family. In 625 Arnulf took part in a council held by the Frankish bishops at Reims.