LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Pūpius1

Pūpius m sg (genitive Pūpiī or Pūpī)
Classical[ˈpuː.pi.ʊs]Ecclesiastical[ˈpuː.pi.us]

Meaning

  1. a Roman nomen gentile, gens or "family name" famously held by
  2. Marcus Pupius Piso Frugi Calpurnianus, a Roman consul

Declension

declension
formsingularplural
nominativePūpius—
genitivePūpiī
Pūpī		—
dativePūpiō—
accusativePūpium—
ablativePūpiō—
vocativePūpī—

Pūpĭus, i, m.,
I. the name of a Roman gens.
1. Cn. Pupius, Cic. Fam. 13, 9, 3.—
2. L. Pupius, a centurion of the primipili, a Pompeian, Caes. B. C. 1, 13.—
3. Pupius, a tragic poet, Hor. Ep. 1, 1, 67.—Hence,
II. Pū-pĭus, a, um, adj., of or belonging to a Pupius, Pupian: lex, of the people's tribune Pupius, Cic. Q. Fr. 2, 11 (13), 3; id. Fam. 1, 4, 1.

In the Academy Smith's classical dictionaries

Biography & mythologyPupiusPupius. a Roman dramatist, whose compositions are characterised by Horace, whether ironically or not we cannot tell, as the "lacrymosa poemata Pupi." …
adjectivefirst/second-declension adjective
Pūpius2
Pūpius (feminine Pūpia, neuter Pūpium)
Classical[ˈpuː.pi.ʊs]Ecclesiastical[ˈpuː.pi.us]

Meaning

  1. adjectiveof or pertaining to the gens Pupia.

Declension

singular
formmasculinefeminineneuter
nominativePūpiusPūpiaPūpium
genitivePūpiīPūpiaePūpiī
dativePūpiōPūpiaePūpiō
accusativePūpiumPūpiamPūpium
ablativePūpiōPūpiāPūpiō
vocativePūpiePūpiaPūpium
plural
formmasculinefeminineneuter
nominativePūpiīPūpiaePūpia
genitivePūpiōrumPūpiārumPūpiōrum
dativePūpiīsPūpiīsPūpiīs
accusativePūpiōsPūpiāsPūpia
ablativePūpiīsPūpiīsPūpiīs
vocativePūpiīPūpiaePūpia

In the Academy Smith's classical dictionaries

Biography & mythologyPupiusPupius. a Roman dramatist, whose compositions are characterised by Horace, whether ironically or not we cannot tell, as the "lacrymosa poemata Pupi." …

Quick answers

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