Author
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī3
- Ismāʻīl ibn Ibrāhīm İsfendiyaroǧlu3
- Isḥāq ibn Ḥasan Tūqādī3
- Ivo of Chartres3
- Jabartī, Ḥasan ibn Ibrāhīm, 1698 or 1699-1774?3
- Jacob Anatoli3
- Jacob ben Asher3
- Jacobus de Teramo3
- Jacques Legrand3
- Jaghmini3
- Jalal Al-Din Al-Khabazi3
- Jalaluddin al-Mahalli3
- James of Milan3
- Jayakr̥ṣṇa3
- Jaʻfar Astarābādī3
- Jean Gerson3
- Jean de Meun3
- Johann Neudörffer the Younger3
- John Cassian3
- John Halgren of Abbeville3