The History of Humāyūn (Gulbadan Begam) 40: XIX. Bega Begam Mīrān-shāhī (? No. 22 Bega Kīlān Begam).

40

Daughter of Sultan Mahmūd Mīrzā and Khānzāda II. Begam, wife of Haidar Mīrzā and mother of Shād Begam (No. 28).
In 901 H. (1495) Sultan Husain Bāī-qarā was besieging Hisar, which was held for Bega’s brother Mas‘ūd, and in which she was. Husain became apprehensive about the spring rains and patched up a peace, the seal of which was Bega’s marriage with his son Haidar, her first cousin through his mother, Payanda-sultan. The betrothal took place outside the fort, with assistance of such music as could be procured, and later when the bride was taken to Harat, the marriage was celebrated with the splendour loved by Husain and befitting a Timurid alliance. Haidar was a full Timurid; Bega was one on her father’s side, and probably as a Tirmiz sayyida’s daughter, drew through her also a strain of the same blood.
Haidar died before his father, i.e., before 912 H. (April, 1506).