Doquz Khatun (also spelled Dokuz Khatun) (d. 1265) was a 13th-century princess of the Keraites who was married to Hulagu Khan, founder of the Ilkhanate. Their son, Abaqa Khan, succeeded Hulagu upon his death.
Doquz Khatun was a Christian in the Church of the East, and is often mentioned as a great benefactor of the Christian faith. When Mongol envoys were sent to Europe, they also tried to use Doquz's Christianity to advantage, by claiming that Mongol princesses such as Doquz and Sorghaghtani Beki were daughters of the legendary Prester John.
She died in 1265, the same year as her husband.
- Runciman, Steven (1987). A History of the Crusades. Cambridge University Press. ISBN 978-0-521-34770-9.
- Jackson, Peter (2014). The Mongols and the West: 1221-1410. Taylor & Francis. ISBN 978-1-317-87898-8.