LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Plaetōrius1

Plaetōrius m (genitive Plaetōriī or Plaetōrī)
Classical[pɫae̯ˈtoː.ri.ʊs]Ecclesiastical[pleˈtɔː.ri.us]

Meaning

  1. The name of a Roman gens, famously held by
  2. Marcus Plaetorius Cestianus (a Roman praetor)

Declension

declension
formsingularplural
nominativePlaetōriusPlaetōriī
genitivePlaetōriī
Plaetōrī		Plaetōriōrum
dativePlaetōriōPlaetōriīs
accusativePlaetōriumPlaetōriōs
ablativePlaetōriōPlaetōriīs
vocativePlaetōrīPlaetōriī

Plaetōrĭus, i, m.,
I. the name of a Roman gens.
I. L. Plaetorius, Cic. Clu. 60, 165.—
II. M. Plaetorius, Cic. Clu. 45, 126; 53, 147; id. Fam. 1, 8, 1.—Hence,
A. Plae-tōrĭus, a, um, adj., Plœtorian: lex, a law of the tribune of the people, Plœtorius, for the protection of minors, Varr. L. L. 6, 2, § 5; Censor. de Die Nat. 24.—
B. Plae-tōrĭānus, a, um, adj., of or belonging to a Plœtorius, Plœtorian: incendium, Cic. Att. 5, 20, 8.

Origins

The gens is likely of Latin/Italic origin; compare laetus (“glad, cheerful”).

In the Academy Smith's classical dictionaries

Biography & mythologyPlaetoriusPlaetorius. 5. M. Plaetorius, was the accuser, in B. C. 69, of M. Fonteius, whom Cicero defended [FONTEIUS, No. 5]. About the same time he was curule …
adjectivefirst/second-declension adjective
Plaetōrius2
Plaetōrius (feminine Plaetōria, neuter Plaetōrium)
Classical[pɫae̯ˈtoː.ri.ʊs]Ecclesiastical[pleˈtɔː.ri.us]

Meaning

  1. adjectiveof or pertaining to the gens Plaetoria

Declension

singular
formmasculinefeminineneuter
nominativePlaetōriusPlaetōriaPlaetōrium
genitivePlaetōriīPlaetōriaePlaetōriī
dativePlaetōriōPlaetōriaePlaetōriō
accusativePlaetōriumPlaetōriamPlaetōrium
ablativePlaetōriōPlaetōriāPlaetōriō
vocativePlaetōriePlaetōriaPlaetōrium
plural
formmasculinefeminineneuter
nominativePlaetōriīPlaetōriaePlaetōria
genitivePlaetōriōrumPlaetōriārumPlaetōriōrum
dativePlaetōriīsPlaetōriīsPlaetōriīs
accusativePlaetōriōsPlaetōriāsPlaetōria
ablativePlaetōriīsPlaetōriīsPlaetōriīs
vocativePlaetōriīPlaetōriaePlaetōria

Origins

The gens is likely of Latin/Italic origin; compare laetus (“glad, cheerful”).

In the Academy Smith's classical dictionaries

Biography & mythologyPlaetoriusPlaetorius. 5. M. Plaetorius, was the accuser, in B. C. 69, of M. Fonteius, whom Cicero defended [FONTEIUS, No. 5]. About the same time he was curule …

Quick answers

What does Plaetōrius mean in Latin?
Plaetōrius, a proper noun, means “The name of a Roman gens, famously held by”.
What is the genitive of Plaetōrius?
The genitive singular is Plaetōriī. Plaetōrius is masculine, second declension.
How do you pronounce Plaetōrius?
In classical Latin, [pɫae̯ˈtoː.ri.ʊs]; in ecclesiastical (church) Latin, [pleˈtɔː.ri.us].