LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Laberius

Laberius m sg (genitive Laberiī or Laberī)
Classical[ɫaˈbɛ.ri.ʊs]Ecclesiastical[laˈbɛː.ri.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularDecimus Laberius, a Roman eques

Declension

declension
formsingularplural
nominativeLaberius—
genitiveLaberiī
Laberī		—
dativeLaberiō—
accusativeLaberium—
ablativeLaberiō—
vocativeLaberī—

Lăbĕrĭus, a,
I. name of a Roman gens; so esp. D. Laberius, a knight, celebrated as a composer of mimes, Cic. Fam. 7, 11; 12, 18; Hor. S. 1, 10, 6; Suet. Caes. 39; Sen. de Ira, 2, 11; Macr. S. 2, 7.—Hence,
II. Lă-bĕrĭānus, a, um, adj., of or belonging to D. Laberius, Laberian: versus, Sen. de Ira, 2, 11, 4.

Quick answers

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