Abū al-Fatḥ al-Daylamī, al-Nāṣir b. al-Ḥasan b. Muḥammad (d. 444/1052), was a Yemeni Zaydī scholar and statesman and the author of a famous work of Qurʾān commentary. There are different versions of his name and lineage in the sources: some follow his line of descent back to al-Ḥasan b. ʿAlī and others back to Ḥusayn b. ʿAlī (al-ʿArshī, 36; al-Muḥallī, 2/99; Yaḥyā, 1/246; Zabāra, Aʾimma, 1/90); and his name has been recorded as either al-Ḥusayn b. al-Nāṣir or Abū al-Fatḥ b. al-Nāṣir (al-Muḥallī, 2/99; Yaḥyā, 1/246).

It is not known exactly when or …