Author
- Jalaluddin al-Mahalli1
- Jamāl al-Dīn Aḥmad ibn Muḥammad Ẓāhirī1
- Jamāl al-Dīn Ḥaṣīrī1
- Jean Carteron1
- Jean de Lignieres1
- Joanna I of Naples1
- John Gower1
- John Larry England1
- John XXII1
- John of Saxony1
- Joseph ben Abraham Gikatilla1
- Joseph ben Judah ibn Aknin1
- Kamāl al-Dīn Turkumānī1
- Konrad III. von Soltau1
- Laurent d'Orleans1
- Lucan1
- Marceiu Vinnen1
- Matteo Piccolomini1
- Matthew of Vendôme1
- Maximus of Turin1