Wikipedia
Qabus
Qabus ibn Wushmagir (full name: Abol-Hasan Qābūs ibn Wušmagīr ibn Ziyar Sams al-maʿālī, ; (died 1012) (r. 977–981; 997–1012) was the Ziyarid ruler of Gurgan and Tabaristan in medieval Iran. His father was Vushmgir and his mother was a daughter of the Bavandi Ispahbad Sharwin II.