Author
- Johan de Arcenay1
- Johannes de Sacrobosco1
- John Chrysostom1
- John de Breton1
- John de Seccheville1
- Justinian I1
- Leo Archpriest1
- Mahmud ibn Abd al-Rahman al-Isfahani1
- Muhammad ibn Ja'far al-Khara'iti1
- Muslim ibn al-Ḥajjāj1
- Muḥammad Ibn-Ibrāhīm Ibn-Ǧamāʿa1
- Muḥammad ibn Muḥammad Akhsīkathī1
- Muḥammad ibn ʻAbbād Khilāṭī1
- Oglerio di Lucedio1
- Peter Paludanus1
- Peter of Limoges1
- Petrus Riga1
- Piccolomini1
- Piccolomo Oltremonti1
- Podestà of Monticchiello (Italy)1