Author
- Hugh Ripelin of Strasburg1
- Hugh of Saint Victor1
- Hugh of Saint-Cher1
- Ibn Abi Zayd al-Qayrawani1
- Innocent III1
- Isaac Israeli ben Solomon1
- Ismail ibn Hammad al-Jawhari1
- Jacobus de Voragine1
- Jacopone da Todi1
- Jacques Bruyant1
- Jalaluddin al-Mahalli1
- Jami1
- Jean Barthélémy1
- Jean de Wavrin1
- Jerome1
- Johannes Milis1
- Johannes de Sacrobosco1
- John Chrysostom1
- John Dominici1
- John Larry England1