Pepin of Landen
Dagobert was the eldest son of Chlothar II and Haldetrude (575–604) and the grandson of Fredegund. Chlothar had reigned alone over all the Franks since 613. In 622, Chlothar made Dagobert king of Austrasia, almost certainly to bind the Austrasian nobility to the ruling Franks. As a child, Dagobert lived under the care of the Carolingian dynasty forebears and Austrasian magnates, Arnulf of Metz and Pepin of Landen.