LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Octāvius

Octāvius m sg (genitive Octāviī or Octāvī)
Classical[ɔkˈtaː.wi.ʊs]Ecclesiastical[okˈtaː.vi.us]

Meaning

  1. a Roman nomen gentile, gens or "family name" famously held by
  2. Augustus, the first Roman emperor

Declension

declension
formsingularplural
nominativeOctāvius—
genitiveOctāviī
Octāvī		—
dativeOctāviō—
accusativeOctāvium—
ablativeOctāviō—
vocativeOctāvī—

Octāvĭus, i, m.; Octāvĭa, ae, f.,
I. the name of a Roman gens, Suet. Aug. 1 sq.; cf. Drumann, History of Rome, vol. iv. p. 218 sq.
1. C. Octavius, the father of the emperor Augustus, Cic. Att. 2, 1, 12; id. Phil. 3, 6, 15.—
2. Cn. Octavius, the first consul of this gens, Cic. Off. 1, 39, 138.—
3. M. Octavius Caecina, a tribune of the people, Cic. N. D. 1, 38, 106.—
4. Rarely of the emperor Augustus, Juv. 8, 242.—
5. In the fem., Octavia, the name of the two sisters of the emperor Augustus, Suet. Aug. 4; 63; Tac. A. 4, 44.—
6. Octavia was also the name of the daughter of the emperor Claudius and Messalina, Suet. Claud. 27; id. Ner. 7.—
7. Octaviae Porticus, two halls in Rome, Vell. 1, 11; 2, 1; Suet. Aug. 29; Paul. ex Fest. p. 178 Müll.—Hence,
II. Octāvĭānus, a, um, adj., of or belonging to an Octavius, Octavian: Octaviano bello, i. e. in the war of the consul Cn. Octavius with Cinna, Cic. Div. 1, 2, 4: milites, of M. Octavius, who fought for Pompey, Caes. B. C. 3, 9.—Esp., subst.: Octāvĭānus, i, m., a surname of the emperor Augustus, who was adopted out of the gens Octavia into the gens Julia, Cic. Fam. 12, 25, 4; Tac. A. 13, 6; Aur. Vict. Vir. Ill. 79, 1; id. Caes. 1, 2.

Origins

From octāvus (“eighth”) + -ius.

Descendants
  • CatalanOctavi
  • FrenchOctave
  • ItalianOttavio
  • PortugueseOtávio
  • RomanianOctav
  • SpanishOctavio
  • SicilianUttavi

In the Academy Smith's classical dictionaries

Biography & mythologyOctaviusOctavius. 3. Cn. Octavius, son of No. 2. In the winter of B. C. 170 he was sent into Greece as ambassador, with C. Popillius Laenas, and on his return…

Quick answers

What does Octāvius mean in Latin?
Octāvius, a proper noun, means “a Roman nomen gentile, gens or "family name" famously held by”.
What is the genitive of Octāvius?
The genitive singular is Octāviī. Octāvius is masculine, second declension.
How do you pronounce Octāvius?
In classical Latin, [ɔkˈtaː.wi.ʊs]; in ecclesiastical (church) Latin, [okˈtaː.vi.us].