Thaïs, a historical novel written by Anatole France

Thais, the plural of Thai - the name given to people of Thailand's ethnic majority.

Thais, a genus of gastropod mollusc

Thaïs, a celebrated ancient Greek hetaera.

Thaïs, an opera by Jules Massenet

Thais of Athens, a historical novel by Ivan Efremov

Thais, the biggest city in the MMORPG computer game: Tibia