Author
- Ivo of Chartres1
- Jacobo Bellenden1
- Jacobus Dinetus1
- Jacopo Ragone1
- Jagannatha Panditaraja1
- Jalal al-Din Davani1
- Jalal al-Din al-Suyuti1
- Jalaluddin al-Mahalli1
- James of Viterbo1
- Jawād ibn Saʻd Jawād al-Baghdādī1
- Jayadeva1
- Jean Filesac1
- Jean Marot1
- Jerónimo Román y Zamora1
- Johannes Lichtenberger1
- Johannes Mellarinus1
- Johannes Paulus1
- Johannes Tostius1
- Johannes de Sacrobosco1
- Johannes von Kastl1