When his father, Clotaire II, King of the Franks, died in 629, Charibert made a bid for the kingdom of Neustria against his elder half-brother Dagobert I, who had already been king of Austrasia since 623. In the ensuing negotiations, Charibert, a minor, was represented by his uncle Brodulf, the brother of Queen Sichilde. Dagobert had Brodulf killed and ceded the near-independent realm of Aquitaine to Charibert. This agreement was confirmed in 631, when Charibert stood godfather to Dagobert's son Sigebert.
Charibert's realm included Toulouse, Cahors, Agen, Perigueux, and Saintes, to which he added his possessions in Gascony. Charibert was married to Gisela, the heiress of Amand of Gascony. His fighting force subdued the resistance of the Basques, until the whole of the Basque Country was under his control.
In 632, Charibert died at Blaye, Gironde—possibly assassinated on Dagobert's orders—and soon after that Charibert's infant son Chilperic was also killed. Aquitaine passed again to Dagobert. Both Charibert and his son are buried in the early RomanesqueBasilica of Saint-Romain at Blaye.
