Author
- Gregory I1
- Gregory X1
- Gregory XI1
- Guillaume de Lorris1
- Guillaume de Salins1
- Guyart des Moulins1
- Henry de Bracton1
- Ibn Hajar al-Asqalani1
- Ibn Manzur1
- Ibn Sidah1
- Ibn al-Kharrāṭ1
- Ibn al-Salah1
- Ibn al-Wardi1
- Ibn ʿAqīl1
- Innocent III1
- Isaac ben Joseph of Corbeil1
- Ismāʻīl ibn Muḥammad Iṣfahānī1
- Ismāʿīl Ibn-Muḥammad Ibn-Bardis1
- Izz al-Din ibn 'Abd al-Salam1
- Izz al-Din ibn Hibatullah ibn Abi l-Hadid1