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Hasan ibn Zayd
founding emir of Tabaristan
Years: 835 - 884
Al-Ḥasan ibn Zayd ibn Muḥammad ibn Ismā‘il ibn al-Ḥasan ibn Zayd (died 6 January 884), also known as al-Da‘ī al-kabīr (Arabic: "the Great/Elder Missionary"), is an Alid who becomes the founder of the Zaydid dynasty of Tabaristan.
