Zubaida Khatun

• from Continuity and Change in Medieval Persia by Ann K.S. Lambton:

Mu'ayyid al-Mulk, after an abortive attempt by the amir Oner to organize a rebellion, joined in Muhammad b. Malik-Shah, who was contesting Berk-Yaruq’s supremacy, and became his wazir in 492/1098-9. In the fighting between Berk-Yaruq’s supporters and Muhammad’s, Zubaida Khatun was taken prisoner and Mu’ayyid al-Mulk had her strangled in Ray. During the second campaign between Muhammad and Berk-Yaruq, he was captured near Hamadan in 494/1100 and Berk-Yaruq executed him in revenge for his mother.

• from the same source, Zubaida is mentioned as the daughter of Yaquti b. Chagri Bey.