Cetaganda most usually referred to the Cetagandan Empire, but it could also refer to the planet Eta Ceta IV, or to Eta Ceta's capital city.

"Cee shivered, as a man forcing himself awake from some bright but dangerous narcotic dream. 'There are oceans on Cetaganda,' he whispered, 'but I never saw them. My whole life was corridors.'"
―A reference to the planet Eta Ceta IV[src]