Aiy (Sakha: Айыы, Turkish: Ayıhı, Azerbaijanese: Ayıhı, Bulgarian: Айъ or Айы, Russian: Айыы) are benevolent spirits in Yakut mythology. They are creators of the world and fabulous land of the Yakut Olonkhos. In Sakha belief, creator of the world "Urung Ai Toyon", is the greatest of them. According to mythology, the Aiy live in the Upper World. It is believed that the Aiyy will not accept blood sacrifice and therefore they are presented "victims" of vegetable and dairy products.
Aiy symbols are required for the Ysyakh (spring feast) and regulated by the government of the Republic of Sakha.