Author
- Innocent IV1
- Innocent V1
- Jacob Meyer1
- Jacques Bruyant1
- Jacques Legrand1
- Jacques Millet1
- Jean Barthélémy1
- Jean Bayard1
- Jean Filesac1
- Jean Germain1
- Jean Gerson1
- Jean Marot1
- Johannes Hymmonides1
- Johannes Magistri1
- Johannes de Sacrobosco1
- Johannes von Freiburg1
- John XXII1
- John of Damascus1
- John of Garland1
- John of Saxony1