Doquz Khatun (also spelled Dokuz Khatun) (d. 1265) was a Turkic Kerait princess of the 13th century, who was married to the Mongol ruler Hulagu.
David VII married her in 1263, after Hulagu Khan put his previous wife, Gvantsa, to death in response to David's abortive rebellion against the Ilkhanate.
Exultavit cor nostrum is a letter, also known as a Papal bull, from Pope Urban IV to the Mongol Ilkhanate leader Hulagu in 1263/1264.
Hulagu Khan or Halaku Khan, Mongol ruler and grandson of Genghis Khan
He was a lieutenant and confidant of the Mongol Ilkhan Hulagu, assisting him in his conquests in the Middle East.
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The Ilkhanate was based, originally, on Genghis Khan's campaigns in the Khwarazmian Empire in 1219–1224, and was founded by Genghis's grandson, Hulagu Khan.
In 1257 the governor of Sindh offered his entire province to Hulagu Khan, Mongke's brother, and sought Mongol protection from his overlord in Delhi.