The tradition embodied in the "Anglo-Saxon Chronicle", and in the genealogies of the West Saxon dynasty, is open to considerable doubt. This is largely because the founder of the dynasty and a number of his alleged descendants had Brittonic Celtic, rather than Anglo-Saxon Germanic, names. The name Cerdic is derived from the British name *Caraticos. This may indicate that Cerdic was a native Briton, and that his dynasty became anglicised over time. Other members of the dynasty possessing Celtic names include Ceawlin and Cædwalla. Cædwalla, who died as late as 689, was the last West Saxon king to possess a Celtic name.