Kököchin, also
Kökechin,
Kokachin or
Cocacin (Mn: Хөхөхчин,
Ch: 阔阔真), was a 13th-century Mongol princess from the
Yuan dynasty in
China, belonging to the Mongol tribe of the
Bayaut (Ch: 伯牙吾). In 1291, she was betrothed to the
Ilkhanate khan
Arghun by the Mongol Great Khan
Kublai. This followed a request by Arghun to his grand-uncle Kublai, following the loss of his favourite wife
Bolgana ("Zibeline"): Arghun asked Kublai Khan to send him a relative of his dead wife, and Kublai chose the 17-year-old Kökötchin ("Blue, or Celestial, Dame").