Author
- Ibn Malik1
- Ibn Taymiyyah1
- Ibn al-Ajdābī1
- Ibn al-Khabbaz1
- Isidore of Seville1
- Jacobus de Voragine1
- Jaghmini1
- Jalal Al-Din Al-Khabazi1
- Johannes de Sacrobosco1
- John Chrysostom1
- John de Breton1
- John de Seccheville1
- Justinian I1
- Ka'b bin Zuhayr1
- Leo Archpriest1
- Muhammad al-Shaybani1
- Mundhirī1
- Muntajab al-Hamadhānī1
- Muslim ibn al-Ḥajjāj1
- Muḥammad ibn ʻAbd Allāh Iskāfī1