What does Nemesa mean in Latin?

Nemesa, a proper noun, means “a river in Germany, mentioned by Ausonius, now the Nims”.

What is the genitive of Nemesa?

The genitive singular is Nemesae. Nemesa is masculine, first declension.

proper noun · masculinefirst declension

Nemesa m sg (genitive Nemesae)

Nĕmĕsa, ae, m.,

I. a river in Belgic Gaul, now the Nims, Aus. Mosell. 354.

What does Nemesa mean in Latin?: Nemesa, a proper noun, means “a river in Germany, mentioned by Ausonius, now the Nims”.
What is the genitive of Nemesa?: The genitive singular is Nemesae. Nemesa is masculine, first declension.