What does Thyamis mean in Latin?

Thyamis, a proper noun, means “A river of Epirus flowing into the Adriatic Sea, now called Kalamas”.

What is the genitive of Thyamis?

The genitive singular is Thyamidis. Thyamis is masculine, third declension.

In classical Latin, [ˈtʰy.a.mɪs]; in ecclesiastical (church) Latin, [ˈtiː.a.mis].

proper noun · masculinethird declension

Thyamis m sg (genitive Thyamidis)

Classical[ˈtʰy.a.mɪs]Ecclesiastical[ˈtiː.a.mis]

masculinesingularA river of Epirus flowing into the Adriatic Sea, now called Kalamas

Thўămis, is, m., = Θύαμις,

I. a river in Epirus, now the Calamas, Plin. 4, 1, 1, § 4; Cic. Att. 7, 2, 3; id. Leg. 2, 3, 7.

Borrowed from Ancient Greek Θύαμις (Thúamis).