ibn ʿUmar ibn Yūsuf ibn Muḥammad al-Urmawī—later called al-Baghdādī—a Shāfiʿī.
He was born in Baghdad in 459 AH.
With his father’s personal care he heard hadith from: Abū Jaʿfar ibn al-Muslima, ʿAbd al-Ṣamad ibn al-Maʾmūn, Abū al-Ḥusayn ibn al-Muhtadī billāh, Abū al-Ḥusayn ibn an-Naqqūr, Abū Bakr al-Khaṭīb, Jābir ibn Yāsīn, Abū Bakr Muḥammad ibn ʿAlī al-Khayyāṭ the Qur’an-reciter, Abū Naṣr al-Zaynabī, and a number of others.
Those who transmitted from him include Ibn ʿAsākir⦗1⦘, al-Silafī, al-Samʿānī, ʿAbd al-Khāliq ibn Asad, ʿUmar ibn Ṭabarzad, Ibrāhīm ibn al-Butayt, the judge Asʿad ibn al-Munajjā, Muḥammad ibn ʿAlī ibn al-Ṭarrāḥ, Mubārak ibn Ṣadaqa al-Ḥāsib, Yūnus ibn Yaḥyā al-Hāshimī, ʿUmar ibn Masʿūd al-Bazzāz al-Zāhid, Zāhir ibn Rustum, ʿUthmān ibn Ibrāhīm ibn Fāris al-Sībī, his brother Ismāʿīl al-Khabbāz, Shujāʿ ibn Sālim al-Bayṭār, al-Tāj al-Kindī, Dāwūd ibn Mulāʿib, his sister Ḥafṣah bint Mulāʿib, his grandson Yūsuf ibn Muḥammad al-Urmawī, Mūsā ibn al-Ṣayqal al-Hāshimī, Ismāʿīl ibn Saʿdullāh ibn Ḥamdī, Muẓaffar ibn Ghaylān al-Daqqāq, Saʿīd ibn Muḥammad al-Razzāz, Mismar ibn ʿUways al-Nayyār, ʿAbd al-Raḥmān ibn al-Mubārak ibn al-Mushtari, Aḥmad ibn Yūsuf ibn Ṣirmā, al-Fatḥ ibn ʿAbd al-Salām, and many others.
He was a jurist, a skilled debater and theologian, devout, and held in great esteem.
Al-Samʿānī said: “A jurist, an imām, pious, reliable, righteous, eloquent, much….”