LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Arruntius

Arruntius m sg (genitive Arruntiī or Arruntī)
Classical[arˈrʊn.ti.ʊs]Ecclesiastical[arˈrun.t͡si.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularLucius Arruntius, a Roman admiral

Declension

declension
formsingularplural
nominativeArruntius—
genitiveArruntiī
Arruntī		—
dativeArruntiō—
accusativeArruntium—
ablativeArruntiō—
vocativeArruntī—

Arruntĭus, ii, m.,
I. a Roman nomen.
I. L. Arruntius, consul A.U.C. 759, Tac. A. 1, 13; 3, 11; 6, 5; prob. the same as the historian L. Arruntius, who composed a work on the Punic Wars, Sen. Ep. 114, 17 sqq.—
II. Arruntius, a celebrated artist under Claudius Cœsar, Plin. 29, 1, 5, § 7.—
III. Arruntius Stella, a poet, Stat. S. 1, 2; Mart. 6, 21.—
IV. Arruntius Caelius, a Latin grammarian, Diom. I. p. 307 P.; Prisc. III. p. 607 P.

Origins

From Arrūns (“son of Tarquinius”) + -ius.

In the Academy Smith's classical dictionaries

Biography & mythologyArruntiusArruntius. 3. L. Arruntius, son of the preceding, consul A. D. 6. Augustus was said to have declared in his last illness, that Arruntius was not unwor…

Quick answers

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