LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Pescennius

Pescennius m sg (genitive Pescenniī or Pescennī)
Classical[pɛsˈkɛn.ni.ʊs]Ecclesiastical[peʃˈʃɛn.ni.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularPescennius Niger, a Roman emperor

Declension

declension
formsingularplural
nominativePescennius—
genitivePescenniī
Pescennī		—
dativePescenniō—
accusativePescennium—
ablativePescenniō—
vocativePescennī—

Pescennĭus, i, m.,
I. name of a Roman gens.
I. A friend of Cicero, Cic. Fam. 14, 4, 6.—Esp.,
II. Pescennius Niger, a Roman emperor; hence, Pescenniānus, a, um, adj., pertaining to the emperor Pescennius: reliquiae, Spart. Sev. 15, 4: domus, id. Pesc. Nig. 12, 4.

Origins

Probably from Oscan.

Quick answers

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