LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Ninnius

Ninnius m sg (genitive Ninniī or Ninnī)
Classical[ˈnɪn.ni.ʊs]Ecclesiastical[ˈnin.ni.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularLucius Ninnius Quadratus, a Roman tribune

Declension

declension
formsingularplural
nominativeNinnius—
genitiveNinniī
Ninnī		—
dativeNinniō—
accusativeNinnium—
ablativeNinniō—
vocativeNinnī—

Ninnius, a,
I. the name of a noble Campanian gens, Liv. 23, 8.—So,
1. L. Ninnius Quadratus, a tribune of the people, Cic. Att. 3, 23, 4; id. Sest. 31, 68.—
2. Ninnius Crassus, who translated the Iliad into Latin, Prisc. 865 P.; cf. Non. p. 475, 14.

Quick answers

What does Ninnius mean in Latin?
Ninnius, a proper noun, means “a Roman nomen gentile, gens or "family name" famously held by”.
What is the genitive of Ninnius?
The genitive singular is Ninniī. Ninnius is masculine, second declension.
How do you pronounce Ninnius?
In classical Latin, [ˈnɪn.ni.ʊs]; in ecclesiastical (church) Latin, [ˈnin.ni.us].