Author
- Ibn Luyun1
- Ibrāhīm al-Ḥusaynī1
- Imbert Feutrier1
- Immanuel Bonfils1
- Isaac Albalag1
- Isaac Israeli ben Joseph1
- Isaac Israeli ben Solomon1
- Isidore of Seville1
- Ivo of Chartres1
- Jacob ben Asher1
- Jacobus Dinetus1
- Jacopo Ragone1
- Jacques Millet1
- Jagannatha Panditaraja1
- Jaghmini1
- Jayadeva1
- Jean Marot1
- Joham de Vernoils1
- Johannes Lichtenberger1
- Johannes Mellarinus1