ʿAbd Allāh b. Maymūn al-Qaddāḥ, known in Imāmī sources as a companion of Jaʿfar al-Ṣādiq, and a renowned transmitter of ḥadīths from him. In anti-Ismaili polemics, however, he is referred to as the founder of the Ismaili movement and the progenitor of the Fāṭimid caliphs.

ʿAbd Allāh's father, Maymūn b. al-Aswad, lived in Mecca during the first half of the 2nd/8th century. He was a disciple of Muḥammad al-Bāqir, from whom he narrated some ḥadīths. Al-Ṭūsī also counts him among the companions of the Shiʿi Imams ʿAlī b. al-Ḥusayn Zayn al-ʿĀbidīn and Jaʿfar al-Ṣādiq (Rijāl, 101, 135, 137). ʿ…