Author
- Jalaluddin al-Mahalli1
- Jawād ibn Saʻd Jawād al-Baghdādī1
- Jean Filesac1
- Jean Gerson1
- Jean Le Fèvre de Ressons1
- Jean de Bernuy1
- Jean de Wavrin1
- Jean-François Roussin1
- Jerónimo Román y Zamora1
- Jewish Community of Pitigliano, Italy1
- Joan Martines1
- Joannes de Crivelli1
- Johann Herolt1
- Johannes Gherinx1
- Johannes Hymmonides1
- Johannes Leonis1
- Johannes Nider1
- Johannes ab Indagine1
- John Bale1
- John Capgrave1