Author
- Jacobo Bellenden1
- Jacobus de Cessolis1
- Jacques Legrand1
- Jaghmini1
- Jalal al-Din al-Suyuti1
- Jalaluddin al-Mahalli1
- Jawād ibn Saʻd Jawād al-Baghdādī1
- Jean Filesac1
- Jean Le Fèvre de Ressons1
- Jean Manesca1
- Jean de Bernuy1
- Jean de Wavrin1
- Jean-François Roussin1
- Jerome1
- Jerónimo Román y Zamora1
- Jirmānūs Farḥāt1
- Joan Martines1
- Joannes Oliva1
- Johan de Arcenay1
- Johann Herolt1