From a Roman family name which was derived from Latin claudus meaning "lame, crippled". This was the family name of several Roman emperors of the 1st century, including the emperor known simply as Claudius. He was poisoned by his wife Agrippina in order to bring her son Nero (Claudius's stepson) to power. The name was later borne by several early saints, including a 7th-century bishop of Besançon.