ʿAlī b. Jaʿfar, Abū al-Ḥasan, the youngest son of Imam Jaʿfar al-Ṣādiq, transmitter of ḥadīths and author of the famous al-Masāʾil. Various nisbas have been attributed to him: al-Hāshimī, al-ʿAlawī, al-Madanī, and the one by which he is best known, al-ʿUrayḍī (Ibn Shahrāshūb, Manāqib, 3/399; al-Ṭūsī, al-Rijāl, 244; Ibn Ḥajar al-ʿAsqalānī, Tahdhīb, 7/258).

He lived in a village named ʿUrayḍ in the vicinity of Medina, as a result of which his descendants became known as al-ʿUrayḍiyyūn (al-Najāshī, 2/72). The village was the property of Imam al-Bāqir…