LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Decius

Decius m sg (genitive Deciī or Decī)
Classical[ˈdɛ.ki.ʊs]Ecclesiastical[ˈdɛː.t͡ʃi.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularPublius Decius Mus, a Roman consul
  3. masculinesingulara Roman praenomen

Declension

declension
formsingularplural
nominativeDecius—
genitiveDeciī
Decī
—
dativeDeciō—
accusativeDecium—
ablativeDeciō—
vocativeDecī—

Dĕcĭus, a.
I. An ancient Italian praenomen: Decius Magius, Liv. 23, 7, 10; Vell. 2, 16, 2 al.—
II. The name of an eminent plebeian gens at Rome. Its bestknown members were the two Decii (P. Decius Mus, father and son), who, as consuls, voluntarily devoted themselves to death to save their country (the former, in the Latin war, at Veseris, B.C. 340, the latter, in the Samnite war, at Sentinum, B.C. 295), Liv. 8, 9; 10, 27 sq.; Val. Max. 1, 7, 3; 5, 6, 5 sq.; Flor. 1, 14, 3; 1, 17, 7; Cic. Off. 2, 4, 16; id. Div. 1, 24, 51; id. Fin. 2, 19, 61; id. de Sen. 13, 43; Prop. 3, 11, 62 (4, 10, 62 M.). —Genit.: Deci, id. 4 (5), 1, 45. Cicero also mentions the grandson, who devoted himself at Asculum in the war against Pyrrhus, B.C. 279, Cic. Tusc. 1, 37, 89; id. Fin. 2, 19, 61 fin.—Hence,
1. Dĕcius, a, um, adj., of or belonging to Decius, lex, of P. Decius Mus, Liv. 9, 30.—
2. Dĕcĭānus, a, um, of or belonging to Decius: exercitus (i. e. of the second Decius), Liv. 10, 31.—
III. An artist at Rome, B.C. 56, Plin. 34, 7, 18, § 44.

In the Academy Smith's classical dictionaries

Quick answers

What does Decius mean in Latin?
Decius, a proper noun, means “a Roman nomen gentile, gens or "family name" famously held by; a Roman praenomen”.
What is the genitive of Decius?
The genitive singular is Deciī. Decius is masculine, second declension.
How do you pronounce Decius?
In classical Latin, [ˈdɛ.ki.ʊs]; in ecclesiastical (church) Latin, [ˈdɛː.t͡ʃi.us].