In the Halo video game series, Eayn a moon of HD 69830 d is the homeworld of the Kig-Yar  species, a member species of the enemy, the Covenant Empire.
In the Halo video game series, Eayn, a celestial body around HD 69830 d, is the habitat of the Kig-Yar species, an enemy faction within the Covenant Empire.