LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Minius

Minius m sg (genitive Miniī or Minī)

Meaning

  1. masculinesingularA river in Gallaecia, now the Minho river

Declension

declension
formsingularplural
nominativeMinius—
genitiveMiniī
Minī		—
dativeMiniō—
accusativeMinium—
ablativeMiniō—
vocativeMinī—

mĭnĭus, a, um, adj. minium,
I. of cinnabar or minium, cinnabar-red, vermilion (Appuleian): rosarum minius color, App. M. 4, p. 143, 3: circulus, id. Flor. 2, p. 348, 33.
Mĭnĭus, ii, m.,
I. a river in Lusitania, now the Minho, Mel. 3, 1, 8; Plin. 4, 20, 34, § 112; 4, 21, 35, § 115.

Origins

From Paleo-Hispanic, from Celtic, either from Proto-Celtic *mino- (“smooth”) (compare Welsh mwyn, Irish mín), from Proto-Indo-European *mei- (“soft, smooth”) or from Proto-Indo-European *mei- (“to go”). Possibly from Latin minium.

Old Spanish
  • SpanishMiño
Elsewhere
  • PortugueseMinhofrom Old Galician-Portuguese Minho
  • GalicianMiñofrom Old Galician-Portuguese Minho

In the Academy Smith's classical dictionaries

GeographyMiniusMinius (Μίνιος: Minho), a river of Spain, rising in the north of Gallaecia, in the Cantabrian mountains, and falling into the Ocean. (Strab. iii. p.15…

Quick answers

What does Minius mean in Latin?
Minius, a proper noun, means “A river in Gallaecia, now the Minho river”.
What is the genitive of Minius?
The genitive singular is Miniī. Minius is masculine, second declension.