LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Arrius

Arrius m sg (genitive Arriī or Arrī)
Classical[ˈar.ri.ʊs]Ecclesiastical[ˈar.ri.us]

Meaning

  1. masculinesingulara Roman nomen gentile, gens or "family name" famously held by
  2. masculinesingularQuintus Arrius, a Roman praetor

Declension

declension
formsingularplural
nominativeArrius—
genitiveArriī
Arrī		—
dativeArriō—
accusativeArrium—
ablativeArriō—
vocativeArrī—

Origins

Probably from Oscan *𐌀𐌓𐌓𐌉𐌄𐌔 (*Arries).

In the Academy Smith's classical dictionaries

Biography & mythologyArriusArrius. 1. Q. Arrius, praetor, B. C. 72, defeated Crixus, the leader of the runaway slaves, and killed 20,000 of his men, but was afterwards conquered…

Quick answers

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