Al-Barqī, the nisba of a Shiʿi family living in Qumm during the 2nd/8th and 3rd/9th centuries. Their famous forebear was Muḥammad b. ʿAlī, a partisan of Zayd b. ʿAlī: after Zayd’s execution, he was arrested by Yūsuf b. ʿUmar al-Thaqafī and was later put to death. Following these incidents the family, including his son and grandson, ʿAbd al-Raḥmān and Khālid, took refuge in the east in a district (rustāq) by the name of the Barq-rūd and settled there (al-Najāshī, 1/204–205; al-Ṭūsī, al-Fihrist, 37; Yāqūt, Udabāʾ, 3/132). There is no consensus on the exact locality of Barq-Rūd, a…