• Jaʿfar ibn Muḥammad ibn al-Mughallis al-Baghdādī: he narrated from Hawtharah al-Minqarī.
Besides these, there are many later transmitters who bear the same name.
However, the Khurasānī Jaʿfar ibn Muḥammad—better known as al-Firyābī—is often confused with the following men:
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Jaʿfar ibn Muḥammad ibn Ḥusayn ibn Ṭughān, Abū al-Faḍl al-Naysābūrī, nicknamed “al-Turkī” (1): trustworthy, a ḥāfiẓ, firmly reliable. He heard from Yaḥyā ibn Yaḥyā, Ibn Rāhwayh, and many others. Among those who reported from him were Ibn al-Sharqī and Abū al-Faḍl Muḥammad ibn Ibrāhīm. He died in 295 AH.
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Jaʿfar ibn Muḥammad ibn Sawwār al-Naysābūrī, the ḥāfiẓ (2): he travelled widely and recorded hadith from Qutaybah, ʿAmr ibn Zurārah, and their peers; he was a man of considerable stature.
Thus it is possible that either of these two men is the one from whom the aforementioned Muḥammad ibn Yaḥyā al-Azdī narrated, for they and Jaʿfar ibn Muḥammad al-Firyābī belong to the same generation.
We also have Jaʿfar ibn Muḥammad ibn Mūsā, the ḥāfiẓ, Abū Muḥammad al-Naysābūrī al-Aʿraj (3), nicknamed “Jaʿfarak al-Mufīd.” He is the youngest of the three; he narrates from al-Ḥasan ibn ʿArafah and Muḥammad ibn Yaḥyā al-Dhuhlī. He died in Aleppo, and Abū Bakr ibn al-Muqrī related from him.
55 – Ibn Sayyid Ḥamdawayh, Muḥammad ibn Aḥmad al-Hāshimī, their mawlā: the Imām, the gnostic, the shaykh of the worshippers, Abū Bakr Muḥammad ibn Aḥmad ibn Sayyid Ḥamdawayh.