Sultan Ezid (Êzîd) is one of the three divine hypostases of Yezidism, completing the triad of which Tawûsî Melek and Sheikh Adi ibn Musafir are the other two. In the sacred hymns he is an ambiguous figure who appears at times as God himself and at times as an angel, and his identity is frequently merged with that of the Peacock Angel and of Sheikh Adi, so that the three are treated as interchangeable manifestations of a single reality. His annual feast, the Îda Êzî, is among the principal festivals of the Yezidi calendar. The etymology of his name is debated: many scholars connect it with the Iranian word for a divine being (yazata / yazad, Kurdish êzdan), from which the community's own self-designation Êzidî is also often derived, while others have linked it to the Umayyad caliph Yazid I, a connection the Yezidis themselves emphatically deny.