What does Thēbais mean in Latin?

Thēbais, a proper noun, means “Thebaid”.

What is the genitive of Thēbais?

The genitive singular is Thēbaidis. Thēbais is feminine, third declension.

proper noun · femininethird declension

Thēbais f sg (genitive Thēbaidis)

Borrowed from Ancient Greek Θηβαΐς (Thēbaḯs).

Descendants

What does Thēbais mean in Latin?: Thēbais, a proper noun, means “Thebaid”.
What is the genitive of Thēbais?: The genitive singular is Thēbaidis. Thēbais is feminine, third declension.