Ali ibn al-Husayn (Ibn al-Walid)

Ali ibn al-Husayn ibn Ali ibn Muhammad ibn al-Walid (علي بن الحسين بن علي بن محمد بن الوليد) was the ninth Tayyibi Isma'ili Da'i al-Mutlaq in Yemen, from 1268 to his death in 1284.

Life
He was the son and chief assistant of the eighth Da'i, al-Husayn ibn Ali, and thus a member of the Banu al-Walid al-Anf family that dominated the office of Da'i al-Mutlaq almost continuously in the 13th to early 16th centuries.

Due to intense fighting between the Zaidi Imam and the Hamdanids, 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 Da'i, Ali ibn Hanzala, and son of Ali's own ma'dhun (senior deputy).