LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Pompeiī

Pompeiī m pl (genitive Pompeiōrum)
Classical[pɔmˈpɛj.jiː]Ecclesiastical[pomˈpɛː.ji]

Meaning

  1. Pompeii (a maritime city in the south of Campania, overwhelmed by an eruption of Vesuvius, A.D. 79)

Declension

declension
formsingularplural
nominative—Pompeiī
genitive—Pompeiōrum
dative—Pompeiīs
accusative—Pompeiōs
ablative—Pompeiīs
vocative—Pompeiī
locative—Pompeiīs

Pompēji, ōrum, m.,
I. a maritime city in the south of Campania, overwhelmed, together with Herculaneum and Stabiœ, by an eruption of Vesuvius, A. D. 79, Mel. 2, 4, 9; Liv. 9, 38; Sen. Q. N. 6, 1, 1.—Hence,
II. Pompējānus, a, um, adj., of or belonging to Pompeii, Pompeian: regio, Sen. Q. N. 6, 27, 1: Sarnus, Stat. S. 1, 2, 265: vinum, Plin. 14, 6, 8, § 70: brassica, id. 19, 8, 41, § 140.—
2. Subst.
a. Pom-pējānum, i, n., a villa of Cicero, near Pompeii, Cic. Fam. 7, 3, 1; 7, 4 al.—
b. Pompējāni, ōrum, m., the inhabitants of Pompeii, the Pompeians, Cic. Sull. 21, 60.

Origins

Borrowed from Oscan, from Oscan *pompe (“five”) + -eius. A reference to the city's five districts, from Proto-Italic *kʷenkʷe, from Proto-Indo-European *pénkʷe. See also the gens name Pompeius and quīnque, the native word for “five”.

In the Academy Smith's classical dictionaries

Quick answers

What does Pompeiī mean in Latin?
Pompeiī, a proper noun, means “Pompeii (a maritime city in the south of Campania, overwhelmed by an eruption of Vesuvius, A.D. 79)”.
What is the genitive of Pompeiī?
The genitive singular is Pompeiōrum. Pompeiī is masculine, second declension.
How do you pronounce Pompeiī?
In classical Latin, [pɔmˈpɛj.jiː]; in ecclesiastical (church) Latin, [pomˈpɛː.ji].