What does Avona mean in Latin?

Avona, a proper noun, means “The river Avon”.

What is the genitive of Avona?

The genitive singular is Avonae. Avona is masculine, first declension.

proper noun · masculinefirst declension

Avona m sg (genitive Avonae)

Borrowed from some variety of Insular Celtic; compare Proto-Brythonic *aβon, Proto-Celtic *abū, ultimately from Proto-Indo-European *h₂ep- (“water”).

What does Avona mean in Latin?: Avona, a proper noun, means “The river Avon”.
What is the genitive of Avona?: The genitive singular is Avonae. Avona is masculine, first declension.