The History of Humāyūn (Gulbadan Begam) 167: CXCIX. Zainab-sultan Khanam Chaghatdi Mughal (No. 19).

167

Daughter of Sultan Mahmud Khan Chaghatdi Mughal, favourite wife of Sultan Sa'id Khan Kashghari, her first cousin; aunt of Shah Muhammad Sultan whom Muhammadi Barlas put to death; mother of Ibrahim who was born 930H. (1524), Sa'id's third son and favourite child, of Muhsin, and of Mahmud Yusuf.
On her husband's death in 939H. (July, 1533), she was banished by her stepson Rashid, and went with her children to Kabul where she met Haidar Mirza and where she was under the protection of Kamran.
Gul-badan mentions her in the guest-list, and places her name as present at the Mystic Feast (1531), but this can hardly be right. She could easily have been at the marriage festivities in 1537.
Tar. Rash., E. & R., 146, 375, 388, 467. Gul-badan, 11a, 24b.