What does Danaī mean in Latin?

Danaī, a proper noun, means “the Danaans, the Greeks”.

What is the genitive of Danaī?

The genitive singular is Danaōrum. Danaī is masculine, second declension.

In classical Latin, [ˈda.na.iː]; in ecclesiastical (church) Latin, [ˈdaː.na.i].

proper noun · masculinesecond declension

Danaī m pl (genitive Danaōrum or Danaum)

Classical[ˈda.na.iː]Ecclesiastical[ˈdaː.na.i]

the Danaans, the Greeks
Equō nē crēdite, Teucrī! Quidquid id est, timeō Danaōs et dōna ferentīs.Do not trust the horse, Trojans! Whatever it is, I fear the Danaans, even when bringing gifts.29 BCE – 19 BCE, Vergilius, Aeneis 2.48

Dănăi, v. Danaus, II. A.

From Ancient Greek Δᾰνᾰοί (Dănăoí, “the Danaans, the Greeks”).