However , Dagobert was supported by the Austrasians and Burgundians , and soon reigned over all three domains .
The Neustrian aristocracy chose King Caribert , the half - brother of Dagobert , as king .
Dagobert was supported by the Austrasians and Burgundians , and soon reigned over all three domains .
The Neustrian aristocracy chose King Caribert , the half - brother of Dagobert , as king .