Lewis & Short

Nerva, ae, m.,

  1. I. a Roman family name of the Licinii, Cocceii, and Silii. So M. Cocceius Nerva, the Roman emperor.
    Hence,
  2. II. Nervĭus, a, um, adj., of or belonging to the emperor Nerva, Nervian: miles, of the Nervian legion, Claud. B. Gild. 421.