Ali ibn al-Husayn (Ibn al-Walid)
Ali ibn al-Husayn ibn Ali ibn Muhammad ibn al-Walid was the ninth Tayyibi Isma'ili Dāʿī al-Muṭlaq in Yemen, from 1268 to his death in 1284.
He was the son and chief assistant of the eighth Dāʿī, al-Husayn ibn Ali, and thus a member of the Banu al-Walid al-Anf family, that dominated the office of Dāʿī al-Muṭlaq almost continuously in the 13th to early 16th centuries.
During his tenure, Ali moved from his original seat at Sanaa to the Hamdanid fortress of Arus. He returned to Sanaa only after it was recaptured by the Hamdanids, and died there. He was succeeded by Ali ibn al-Husayn ibn Ali ibn Hanzala, the grandson of the sixth Dāʿī, Ali ibn Hanzala, and son of Ali's own maʾdhūn.
