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.