Author
- Ibn al-Khabbaz2
- Ibn al-Kharrāṭ2
- Ibn al-Salah2
- Ibrāhīm ibn Muṣṭafá Ḥalabī2
- Ibrāhīm ibn Ḥusayn2
- Immanuel Bonfils2
- Innocent V2
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī2
- Jacopo Piccolomini-Ammannati2
- Jacopone da Todi2
- James of Lausanne2
- Jayāditya2
- Jean Germain2
- Jirmānūs Farḥāt2
- Joan Martines2
- Joannes Oliva2
- Johann Herolt2
- Johann Neudörffer the Elder2
- Johannes Nider2
- Johannes von Freiburg2