LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Mūsōnius

Mūsōnius m sg (genitive Mūsōniī or Mūsōnī)
Classical[muːˈsoː.ni.ʊs]Ecclesiastical[muˈs̬ɔː.ni.us]

Meaning

  1. a Roman nomen gentile, gens or "family name" famously held by
  2. Gaius Musonius Rufus, a Roman philosopher

Declension

declension
formsingularplural
nominativeMūsōnius—
genitiveMūsōniī
Mūsōnī		—
dativeMūsōniō—
accusativeMūsōnium—
ablativeMūsōniō—
vocativeMūsōnī—

Mūsōnĭus, i, m.,
I. a famous Stoic philosopher of the time of Tiberius, Vespasian, and Titus, teacher of Epictetus, Tac. A. 14, 59; Plin. Ep. 3, 11, 5; Amm. 27, 9, 6; Gell. 16, 1, 1.—Hence, Mūsōnĭānus, a, um, adj., of or belonging to Musonius, Musonian, Amm. 15, 13, 1; 16, 9, 2.

Quick answers

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