Author
- Izz al-Din ibn 'Abd al-Salam1
- Jacob Anatoli1
- Jacob ben Asher1
- Jacobus de Cessolis1
- Jacopo Piccolomini-Ammannati1
- Jacques Lempereur1
- Jalal Al-Din Al-Khabazi1
- Jalaluddin al-Mahalli1
- Jamāl al-Dīn Aḥmad ibn Muḥammad Ẓāhirī1
- Jamāl al-Dīn Ḥaṣīrī1
- Jean Dupin1
- Jean de Lignieres1
- John Gower1
- John Larry England1
- John XXII1
- Joseph ben Abraham Gikatilla1
- Joseph ben Judah ibn Aknin1
- Laurent d'Orleans1
- Majd ad-Dīn Ibn Athir1
- Marceiu Vinnen1