Author
- Hoccleve, Thomas, 1370?-1450?1
- Honorat Bovet1
- Hugh of Fouilloy1
- Humbert of Romans1
- Iachetus Italianus1
- Immanuel Bonfils1
- Innocent VIII1
- Isaac Israeli ben Joseph1
- Isidore of Seville1
- Jacob ben Jacob, ha-Kohen, -approximately 12701
- Jacobus Balbi1
- Jacobus de Cessolis1
- Jacobus de Voragine1
- Jacomo Veronese1
- Jacopo Nannis de Piccolomini1
- Jacopo Piccolomini-Ammannati1
- Jacopone da Todi1
- Jean Gerson1
- Jean de Malian1
- Jean de Meun1