LATIN DICTIONARYLexicon Latīnum
proper noun · masculinesecond declension

Galileus1

Galileus m sg (genitive Galileī)
Classical[ɡaˈlɪ.ɫe.ʊs]Ecclesiastical[ɡaˈliː.le.us]

Meaning

  1. New Latinmasculinesingulara surname from Italian — famously held by
  2. New LatinmasculinesingularGalileo di Vincenzo Bonaiuti de' Galilei (1564–1642), Italian astronomer, physicist, and engineer.

Origins

From Italian Galilei + Latin -ius.

proper noun · masculinesecond declension
Galileus2
Galileus m sg (genitive Galileī)
Classical[ɡaˈlɪ.ɫe.ʊs]Ecclesiastical[ɡaˈliː.le.us]

Meaning

  1. New Latinmasculinesingularan unknown-gender given name from Italian — famously held by
  2. New LatinmasculinesingularGalileo di Vincenzo Bonaiuti de' Galilei (1564–1642), Italian astronomer, physicist, and engineer.

Declension

declension
formsingularplural
nominativeGalileus—
genitiveGalileī—
dativeGalileō—
accusativeGalileum—
ablativeGalileō—
vocativeGalilee—

Origins

From Italian Galileo + Latin -ius.

Quick answers

What does Galileus mean in Latin?
Galileus, a proper noun, means “a surname from Italian — famously held by”.
What is the genitive of Galileus?
The genitive singular is Galileī. Galileus is masculine, second declension.
How do you pronounce Galileus?
In classical Latin, [ɡaˈlɪ.ɫe.ʊs]; in ecclesiastical (church) Latin, [ɡaˈliː.le.us].