Sheikh or Malak Fakhr ad-Dīn (Kurdish: Şêx Fexredîn, Melik Fexredîn) is a holy figure venerated in Yazidism, he is considered one of the Seven Divine Beings, to all of whom God assigned the World's affairs, and his earthly incarnation is considered one of the four sons of Ezdina Mir along with Nasirdin, Sheikh Shems, and Sejadin, who are the respective ancestors and patriarchs of the four Şemsanî Sheikh lineages and are considered to have been avatars of the angelic beings.
[5] Şêx Fexredîn was a Yezidi poet, philosopher and scholar who lived in the 12th century, he authored much of the poetry that is still recited among the Yezidis today in form of sacred hymns known as Qewls.
[8] Şêx Fexreddin had three sons and one daughter, his sons were Sheikh Bedir, Sheikh Aqub and the oldest of all, Sheikh Mend, who is an important Yezidi saint that became the ruler of Kilis Emirate and is today represented as the Lord of Snakes in the Yezidi religion.
[8] There is a shrine in Ain Sifni dedicated to Sheikh Mend.
[9] Fexreddin's daughter was Xatûna Fexra, a female Yezidi saint represented as the Guardian of birth, pregnant women and therefore of fertility, Yezidi women fast once a year in her honor.