Author
- Heinrich Stegmüller1
- Henry of Langenstein1
- Herbert of Auxerre1
- Ildibrandinus1
- Innocent III1
- Innocent IV1
- Isaac Israeli ben Solomon1
- Isidore of Seville1
- Ivo of Chartres1
- Jacobus Balbi1
- Jacobus de Voragine1
- Jacomo Veronese1
- Jacopo Nannis de Piccolomini1
- Jacopo Piccolomini-Ammannati1
- Jean Carteron1
- Jean Gerson1
- Joanna I of Naples1
- Joannes Dominicus de Marchis1
- John Burgh1
- John Chrysostom1