Abū Muḥammad al-Ḥasan b. ʿAlī b. al-Ḥasan b. ʿAlī b. ʿOmar al-As̲h̲raf b. ʿAlī Zain al-ʿĀbidīn [s. ʿAlī b. al-Ḥusain], born about 230 (844) at Medīna of a Ḵh̲urāsān slave girl, died in S̲h̲aʿbān 304 (beginning of 917) at Āmul as ruler in Ṭabaristān, is recognised under the official name of al-Nāṣir al-Kabīr as Imām by the Zaidīs, and also by those of Yemen.

Al-Uṭrūs̲h̲ came to Ṭabaristān in the reign of the ʿAlid al-Dāʿī al-Kabīr al-Ḥasan b. Zaid [see al-Ḥasan b. Zaid b. Muḥammad]; his brother and successor al-Ḳāʾim bi ’l-Ḥaḳḳ Muḥammad b. Zaid distrusting him, he endeavoured to…