Despite its unique and extremely original character, Yezidism reveals a number of striking parallels with other syncretic religions, in particular, with heterodox Shi'a sects. A part of these parallels are certainly common elements, derived from Islamic Mysticism and, probably, Gnostic teachings (for some Extreme Shi'a doctrines, like Isma'ili, latter is quite certain: they have been formed under a direct influence of Christian Gnosticism). As to proper Extreme Shi'a elements in Yezidi religion, they can be result of a later influence. The Extreme Shi'a sects, generally known as Ghuldt (yulat-i si'a), are distinguished, at least formally, by their specific attitude towards 'Ali (i. e., 'Ali ibn Abi Talib, Fourth Caliph, cousin and son-in-law of Prophet), glorifying him as an object of worship, as of supreme worth. However, in some of them, 'Ali is rather a fairly marginal figure, with obvious traits of an epical hero. Among these sects, largest number of parallels with Yezidism is found with Ahl-i Haqq (People of Truth) and in religion of Zazas. One of main analogies is, first and foremost, religious institution of Brother and Sister of Next World' as well as a number of common characters ('Ali, Fatima, etc.) deified by heterodox Sh'ites and marked in Yezidism. With regard to Ahl-i Haqq in Iran, one of sect's autonymics is Yaresan (the Iraqi Ahl-i Haqq are named Kakdi)2, while Yezidi self-denomination is Ezdixdna, i. e., the abode of Yezidis. The term Yaresan is perhaps going back toyarestan, the abode of those in