Nathan P. Gibson, Vanessa Birkhahn and Hanna Friedel, (eds.), "Yūḥannā ibn Ḥaylān — يوحنا بن حيلان " in Communities of Knowledge: Interreligious Networks of Scholars in Ibn Abi Usaybiʿa’s History of the Physicians last modified June 23, 2021, https://usaybia.net/person/2325 Yūḥannā ibn Ḥaylān يوحنا بن حيلان Yūḥannā ibn Ḥaylān, Christian philosopher (d. during caliphate of al-Muqtadir) https://usaybia.net/person/2325 philosopher Christian Christian A literary history of medicine: the 'Uyūn al-anbā' fī ṭabaqāt al-aṭibbā' of Ibn Abī Uṣaybi'ah 15.1.2 15.1.3 15.1.3.2