He came from a village in Marw and travelled from Khurāsān to Baghdad, which became his place of residence and according to the majority of sources was where he died (Ibn Saʿd, 7/342; al-Sulamī, Ṭabaqāt, 33–34; al-Dhahabī, al-ʿIbar, 1/313; Anṣārī Ḥarawī, 85). According to the sources, his ancestor five generations earlier, who was called either Baʿbūr, Yaʿfūr, Baghnabūr or al-Ghayūr, was given the name ʿAbd Allāh after converting to Islam (al-Khaṭīb, 10/278–279; Ibn ʿAsākir, 10/179; Ibn Khallikān, 1/274; Ibn Kathīr, 10/310). The fi…