Yasa'ur

Yasa'ur (died 1320) was a Chagatai prince, the son of Chübei and father of the future khan Qazan. In 1314 he campaigned against the Ilkhanate with Kebek, defeating an Ilkhan army before Esen Buqa recalled the forces. Accused by Kebek of colluding with the enemy, he defected to Ilkhan Öljeitü, who settled him in the Badghis pastures.

After Öljeitü's death he rebelled against Abu Sa'id in 1319, raiding Mazandaran. Driven back from Herat, he was killed in 1320 by Kebek, now khan.