The Yridian homeworld was the home planet of the Yridian species. The Yridian yak was a well known animal from the planet. (DS9: "Accession")
The treasured Rings of Paltriss were removed from the planet many years ago. (DS9: "Melora")
This might be connected to Yridia.
According to Decipher
's Aliens sourcebook, the Yridian homeworld is called Yrda.