Author
- Henry de Bracton1
- Ibn Bardis1
- Ibn Malik1
- Ibn Manzur1
- Ibn al-Kharrāṭ1
- Ibn al-Ḥājib1
- Innocent III1
- Isaac Alfasi1
- Ismail al-Isfahani1
- Ismail ibn Hammad al-Jawhari1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1
- Jacob ben Asher1
- Jacobus de Cessolis1
- Jalal Al-Din Al-Khabazi1
- Jalal al-Din al-Qazwini1
- Jamāl al-Dīn Aḥmad ibn Muḥammad Ẓāhirī1
- Jamāl al-Dīn Ḥaṣīrī1
- Jean Dupin1
- Jean de Lignieres1
- John Gower1