Naevius was the nomen for the plebeian gens Naevia of ancient Rome.

• Gnaeus Naevius, poet and dramatist 3rd century BC
• Naevius Sutorius Macro, praetorian prefect under Tiberius and Caligula

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The Porta Naevia was a gate in the Servian Wall on the Aventine Hill of Rome.

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In biology, Naevius is a genus of spiders. A number of different species have naevia as the second part of the binomial name.