Author
- Jacques Lempereur1
- Jaghmini1
- 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
- Kamāl al-Dīn Turkumānī1
- Laurent d'Orleans1
- Majd ad-Dīn Ibn Athir1
- Marceiu Vinnen1
- Matthew of Vendôme1
- Maḥmūd ibn Abī Bakr Faraḍī1
- Maḥmūd ibn ʻUbayd Allāh Burhān al-Sharīʻah1