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

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

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