Author
- Ibn Ghazi al-Miknasi2
- Ibn Hijjah al-Hamawi2
- Ibn Jaber al-Andalusi2
- Ibn Zafar2
- Ibn al-Kharrāṭ2
- Ibn al-Shatir2
- Ibn al-Wardi2
- Ibrāhīm ibn Hibat Allāh Lakhmī2
- Ibrāhīm ibn Muṣṭafá Ḥalabī2
- Ibrāhīm ibn Ḥusayn2
- Ikhtiyār al-Dīn ibn Ghiyāth al-Dīn2
- Immanuel Bonfils2
- Immanuel Frances2
- Innocent V2
- Isaac ben Mordekhai Kimḥi2
- Isfarāyīnī, Muḥammad ibn Muḥammad, d. 13462
- Jacob ben Asher2
- Jacobus de Teramo2
- Jacopone da Todi2
- James of Lausanne2