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| Qāghān Beg قاغان بک | |
|---|---|
| Khan of the Golden Horde | |
| Reign | 1375–1377 |
| Predecessor | Urus Khan |
| Successor | ʿArab Shāh |
| Died | after 1380 |
| Issue | Maḥmūd Khwāja |
| Dynasty | Borjigin |
| Father | Īl Beg |
| Religion | Sunni Islam |
Qāghān Beg (Turki/Kypchak: قاغان بک; Persian: غیاث الدین) was Khan of the Golden Horde from 1375 to 1377. He held the traditional capital Sarai during a period of civil war among rival contenders for the throne. Throughout his reign, the westernmost portion of the Golden Horde was under the control of the beglerbeg Mamai and his puppet khan Muḥammad-Sulṭān, while the easternmost portion was under the control of Urus Khan and then his sons.