Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
Nerva, ae, m.,
- I. a Roman family name of the Licinii, Cocceii, and Silii. So M. Cocceius Nerva, the Roman emperor.
Hence,
- II. Nervĭus, a, um, adj., of or belonging to the emperor Nerva, Nervian: miles, of the Nervian legion, Claud. B. Gild. 421.