Sayyida Shirin

Seyyedeh Malek Khatun (Persian: سیده ملک خاتون) (died 1029) was a Sultaness of Buwayhids (Deylamids) of Ray (Rages), Isfahan and Hamadan (Buwayhid dynasty of Iran). After the death of her husband Fakhr od-Dowleh the Deylamid, her 4-year old son, Majd od-Dowleh (993-1029), officially inherited the reign, however she was the true ruler up until her death.

During her rule she was able to protect her realm against powerful opponents, such as Mahmud of Ghazni and Ghaboos of Ziyarid, by her insightful policies. Shortly after her death, Mahmud of Ghazni captured Ray and the Buwayhid realm of Ray, Hamadan and Isfahan came to its end.