Abū al-Ḥasan Khān Beglerbegī Maḥallātī (d. 1206/1792), better known as Sayyid Kahakī, was the imam of the Qāsim-Shāhī Nizārī Ismailis and governor of Kirmān during the period of the Zand dynasty and the grandfather of the first Aga Khan. Some historians trace his genealogy to Ismāʿīl the son of Jaʿfar al-Ṣādiq through Nizār son of the Fāṭimid caliph al-Mustanṣir (Wazīrī, Tārīkh, 332). Others wrongly believe that he was related to Ḥasan-i Ṣabbāḥ or Kiyā Buzurg-Umīd (Bāmdād, 1/37). After the death of Sayyid Ḥasan Beg, the imam of the Nizārī Ismailis during…