LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Matrīnus

Matrīnus m sg (genitive Matrīnī)
Classical[maˈtriː.nʊs]Ecclesiastical[maˈtriː.nus]

Meaning

  1. A river of Picenum flowing into the Adriatic Sea near the city of Hadria

Declension

declension
formsingularplural
nominativeMatrīnus—
genitiveMatrīnī—
dativeMatrīnō—
accusativeMatrīnum—
ablativeMatrīnō—
vocativeMatrīne—

Origins

Possibly related to the Celtic name of Matrona and Modron, but more likely from Proto-Indo-European *meh₂d- (“to be wet”) through a language that had a stop shift *d > t (Germanic, Hittite, Thracian).

In the Academy Smith's classical dictionaries

Quick answers

What does Matrīnus mean in Latin?
Matrīnus, a proper noun, means “A river of Picenum flowing into the Adriatic Sea near the city of Hadria”.
What is the genitive of Matrīnus?
The genitive singular is Matrīnī. Matrīnus is masculine, second declension.
How do you pronounce Matrīnus?
In classical Latin, [maˈtriː.nʊs]; in ecclesiastical (church) Latin, [maˈtriː.nus].