LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Petrēius1

Petrēius m sg (genitive Petrēiī or Petrēī)
Classical[pɛˈtreː.jʊs]Ecclesiastical[peˈtrɛː.jus]

Meaning

  1. a Roman nomen gentile, gens or "family name" famously held by
  2. Marcus Petreius, a Roman praetor

Declension

declension
formsingularplural
nominativePetrēius—
genitivePetrēiī
Petrēī		—
dativePetrēiō—
accusativePetrēium—
ablativePetrēiō—
vocativePetrēī—

Petrēĭus, i, m.,
I. name of a Roman gens. —So, esp, a lieutenant of Pompey in the civil war, Caes. B. C. 1, 38; 63; cf. Cic. Att. 8, 2, 3. He is probably the same person with M. Petrejus, lieutenant of the consul C. Antonius, who defeated the followers of Catiline at Fœsulœ, A. U. C. 692; Cic. Sest. 5, 12; Sall. C. 59, 5 sq.—Hence,
A. Petrēius, a, um, adj., Petreian; here prob. belongs: petreia vocabatur, quae pompam praecedens in coloniis aut municipiis imitabatur anum ebriam, ab agri vitio, scilicet petris, appellata, Paul. ex Fest. p. 243, 5 Müll.; cf. Fest. p. 242, 14 ib.—
B. Petrēiānus, a, um, adj., of or belonging to Petreius, Petreian: auxilium, Auct. B. Afr. 19.

Origins

Pre-Greekbor. Ancient Greek πέτρος (pétros) Ancient Greek Πέτρος (Pétros)bor. Latin Petrus Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -ius Latin -eius Latin Petrēius From Petrus (“Peter”) + -eius.

In the Academy Smith's classical dictionaries

Biography & mythologyPetreiusPetreius. 2. M. Petreius, is first mentioned in B. C. 62, when he served as legatus to the proconsul C. Antonius, in his campaign against Catiline. Bo…
adjectivefirst/second-declension adjective
Petrēius2
Petrēius (feminine Petrēia, neuter Petrēium)
Classical[pɛˈtreː.jʊs]Ecclesiastical[peˈtrɛː.jus]

Meaning

  1. adjectiveRelating to Peter.
  2. adjectiveof or pertaining to the gens Petreia.

Declension

singular
formmasculinefeminineneuter
nominativePetrēiusPetrēiaPetrēium
genitivePetrēiīPetrēiaePetrēiī
dativePetrēiōPetrēiaePetrēiō
accusativePetrēiumPetrēiamPetrēium
ablativePetrēiōPetrēiāPetrēiō
vocativePetrēiePetrēiaPetrēium
plural
formmasculinefeminineneuter
nominativePetrēiīPetrēiaePetrēia
genitivePetrēiōrumPetrēiārumPetrēiōrum
dativePetrēiīsPetrēiīsPetrēiīs
accusativePetrēiōsPetrēiāsPetrēia
ablativePetrēiīsPetrēiīsPetrēiīs
vocativePetrēiīPetrēiaePetrēia

Origins

Pre-Greekbor. Ancient Greek πέτρος (pétros) Ancient Greek Πέτρος (Pétros)bor. Latin Petrus Proto-Indo-European *-(i)yós Proto-Italic *-ijos Proto-Italic *-ios Old Latin -ios Latin -ius Latin -eius Latin Petrēius From Petrus (“Peter”) + -eius.

In the Academy Smith's classical dictionaries

Biography & mythologyPetreiusPetreius. 2. M. Petreius, is first mentioned in B. C. 62, when he served as legatus to the proconsul C. Antonius, in his campaign against Catiline. Bo…

Quick answers

What does Petrēius mean in Latin?
Petrēius, a proper noun, means “a Roman nomen gentile, gens or "family name" famously held by”.
What is the genitive of Petrēius?
The genitive singular is Petrēiī. Petrēius is masculine, second declension.
How do you pronounce Petrēius?
In classical Latin, [pɛˈtreː.jʊs]; in ecclesiastical (church) Latin, [peˈtrɛː.jus].