LATIN DICTIONARYLexicon Latīnum
proper noun · masculinevariously declined, third declension, second declension

Prōteus

Prōteus m sg (genitive Prōteos or Prōteī)
Classical[ˈproː.tɛu̯s]Ecclesiastical[ˈprɔː.teu̯s]

Meaning

  1. Proteus (a sea god in the service of Poseidon)

Declension

declension
formsingularplural
nominativePrōte͡us—
genitivePrōteos
Prōteī
—
dativePrōteō—
accusativePrōtea
Prōteum
—
ablativePrōteō—
vocativePrōte͡u—

Prōteus (dissyl.), ĕi and ĕos, m., = Πρωτεύς,
I. a sea-god who often changed his form; he was in the service of Neptune, and kept his sea-calves, Ov. M. 8, 731; 2, 9; id. A. A. 1, 761; Hor. C. 1, 2, 7; Verg. G. 4, 388; Ov. F. 1, 367: Protei columnae, i. e. the boundary of Egypt, Verg. A. 11, 262.— Transf., of a fickle person: Protea tenere, Hor. Ep. 1, 1, 90; of a cunning person, id. S. 2, 3, 71; cf. Amm. 29, 1, 39.

Origins

Borrowed from Ancient Greek Πρωτεύς (Prōteús).

In the Academy Smith's classical dictionaries

Quick answers

What does Prōteus mean in Latin?
Prōteus, a proper noun, means “Proteus (a sea god in the service of Poseidon)”.
What is the genitive of Prōteus?
The genitive singular is Prōteos. Prōteus is masculine, variously declined, third declension, second declension.
How do you pronounce Prōteus?
In classical Latin, [ˈproː.tɛu̯s]; in ecclesiastical (church) Latin, [ˈprɔː.teu̯s].