Al-Hadi ila'l-Haqq Yahya

Abūʾl-Ḥusayn Yaḥyā ibn al-Ḥusayn ibn al-Qāsim ibn Ibrāhīm Ṭabāṭabā al-Ḥasanī, better known by his honorific title of al-Hādī ilāʾl-Ḥaqq, was a religious and political leader in the Arabian Peninsula. He was the first Zaydi imam who ruled portions of Yemen from 897 to 911. He is also the ancestor of the Rassid Dynasty which ruled Yemen intermittently until the North Yemen Civil War in 1962.