Noun
Roman Emperor after his nephew Caligula was murdered; consolidated the Roman Empire and conquered southern Britain; was poisoned by his fourth wife Agrippina after her son Nero was named as Claudius' heir (10 BC to AD 54)
Source: WordNetReno (1996), p. 263-282 Assuming that Claudius and Arvirargus are supposed to be contemporaries, then this Claudius is the Roman emperor Claudius I (reigned 41–54). Source: Internet