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 year prior to 2370. (DS9: "Melora")

This might be connected to Yridia or Yridia I.
According to the reference book Star Trek: Star Charts (p. 60), Yridia Prime was located in the Yridia star system. This system's primary was a G-type star. Yridia was located in the Beta Quadrant.
According to Decipher's Aliens sourcebook, the Yridian homeworld is called "Yrda".
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