Berthoald (died 622) was the Duke of the Saxons during the reign of the Frankish kings Chlothar II and his son Dagobert I, the last ruling Merovingians.[1] He despised Frankish suzerainty and rebelled, but was defeated. His story is told in the Liber Historiae Francorum (727) and the Gesta Dagoberti (830s), both sources partial to the Merovingian kings.