LATIN DICTIONARYLexicon Latīnum
proper nounfirst declension

Columnae Herculis

Columnae Herculis f pl (genitive Columnārum Herculis)

Meaning

  1. femininepluralPillars of Hercules (two promontories at the Strait of Gibraltar)
    fit deinde angustissimum pelagus, et proxima inter sē Eurōpae atque Āfricae lītora montēs efficiunt, ut initiō dīximus Columnae Herculis, Abila et Calpēs, uterque quidem sed Calpēs magis et paene tōtus in mare prōminēns.Then the strait becomes very narrow, and the nearest shores of Europe and Africa form mountains, as we said in the beginning, the Pillars of Hercules, Abila and Calpes, both of them, but Calpes more and almost entirely protruding into the sea.c. 43 CE, Pomponius Mela, De chorographia 2.95.1
    continentur Gedrōsī, Carmānī, Persae, Elymaeī, Parthyēne, Arīā, Sūsiānē, Mesopotamiā, Seleucīā cognōminātā Babylōniā, Arabiā ad Petrās usque, Syriā Coelē, Pēlūsium, Aegyptī īnferiōra, quae Chōra vocātur, Alexandrīā, Āfricae maratimā, Cȳrēnaicā oppida omnia, Thapsus, Hadrūmētum, Clupeā, Carthāgō, Uticā, uterque Hippō, Numidiā, Mauretāniā utrāque, Atlanticum mare, columnae Herculis.77 CE – 79 CE, Plinius Maior, Naturalis Historia 6.212.2

Declension

declension
formsingularplural
nominative—Columnae Herculis
genitive—Columnārum Herculis
dative—Columnīs Herculis
accusative—Columnās Herculis
ablative—Columnīs Herculis
vocative—Columnae Herculis

Origins

Calque of Ancient Greek Ἠράκλειοι Στῆλαι (Ērákleioi Stêlai).

Quick answers

What does Columnae Herculis mean in Latin?
Columnae Herculis, a proper noun, means “Pillars of Hercules (two promontories at the Strait of Gibraltar)”.
What is the genitive of Columnae Herculis?
The genitive singular is Columnārum Herculis. Columnae Herculis is first declension.