Demasq Kaja

Demasq Kaja (c. 1300–1327), third son of Amir Chupan, was born during Ghazan's siege of Damascus, which gave him his name. He became viceroy of Azerbaijan and Iraq, and from 1325 he wielded the vizier's authority, effectively ruling the Ilkhanid capital Sultaniya while Chupan campaigned in Khurasan.

Abu Sa'id used Demasq's affair with a former concubine of the late Öljeitü as a pretext to move against him. He was captured and killed on 25 August 1327, the first Chupanid to fall.