King of Neustria and Burgundy, Clotaire is the son of Clovis II and Bathilde. It is his mother and the mayor of the palace who ensures the regency. Ébroïn, the mayor of the palace succeeds his father and takes power, leaving the king without authority. On his death in 573, Ebroïn named Thierry III, Clotaire's brother as successor to the detriment of Clovis III, the latter's son.
On the death of Clotaire I, Gontran received the former kingdom of Burgundians (Burgundy), he supported first his brother Sigebert facing Chilpéric, but falls out with him and suddenly takes Chilpérics side. On the death of Chilpéric, Gontran gets closer to his nephew Childebert II (son of Sigebert)