LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Rutēnī1

Rutēnī m pl (genitive Rutēnōrum)
Classical[rʊˈteː.niː]Ecclesiastical[ruˈtɛː.ni]

Meaning

  1. an ancient people of Aquitanian Gaul, now Rodez

Declension

declension
formsingularplural
nominative—Rutēnī
genitive—Rutēnōrum
dative—Rutēnīs
accusative—Rutēnōs
ablative—Rutēnīs
vocative—Rutēnī

Rŭtēni (Rŭth-), ōrum, m.,
I. a people of Aquitanian Gaul, in the vicinity of the Cadurci, dwelling partly in the province now called Rhodez, Départ. Aveyron, Caes. B. G. 1, 45; 7, 7; 75; Plin. 4, 19, 33, § 109; Luc. 1, 402.

Origins

Borrowed from Transalpine Gaulish; possibly from Proto-Indo-European *h₂ruti-, from *h₂rew- (“to shine”) and cognate to Latin rutilus (see for details).

In the Academy Smith's classical dictionaries

proper noun · masculinesecond declension
Rūtēnī2
Rūtēnī m pl (genitive Rūtēnōrum)

Meaning

  1. a tribe of Ruscia (likely the Baltic region) mentioned by Saxo Grammaticus

Declension

declension
formsingularplural
nominative—Rūtēnī
genitive—Rūtēnōrum
dative—Rūtēnīs
accusative—Rūtēnōs
ablative—Rūtēnīs
vocative—Rūtēnī

Origins

Borrowed from Old East Slavic роуси́нъ (rusínŭ).

In the Academy Smith's classical dictionaries

Quick answers

What does Rutēnī mean in Latin?
Rutēnī, a proper noun, means “an ancient people of Aquitanian Gaul, now Rodez”.
What is the genitive of Rutēnī?
The genitive singular is Rutēnōrum. Rutēnī is masculine, second declension.
How do you pronounce Rutēnī?
In classical Latin, [rʊˈteː.niː]; in ecclesiastical (church) Latin, [ruˈtɛː.ni].