masc. proper name, from the name of two Roman gentes, perhaps related to claudus "lame," which is of unknown origin. The Claudian emperors (Tiberius, Caligula, Claudius, and Nero) reigned from 14 to 68 C.E.

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Definitions of Claudius from WordNet

Claudius (n.)
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);
Synonyms: Claudius I / Tiberius Claudius Drusus Nero Germanicus