Abū Muḥammad al-Ḥasan ibn ʿAlī ibn al-Ḥasan ibn ʿAlī ibn ʿUmar al-Ashraf ibn ʿAlī Zayn al-ʿĀbidīn, better known as al-Ḥasan al-Uṭrūsh, was an Alid missionary of the Zaydi Shia sect who re-established Zaydi rule over the province of Tabaristan in... Wikipedia