Author
- Ibn Khallikan2
- Ibn Malik2
- Ibn al-Banna' al-Marrakushi2
- Ibn al-Farid2
- Immanuel Bonfils2
- Ismāʻīl ibn Abī Bakr Ibn al-Muqrī2
- Jean Germain2
- Jean de Meun2
- Jean de Roquetaillade2
- Johann Herolt2
- Johannes Nider2
- John Burgh2
- John Felton2
- John of Genoa2
- John of Wales2
- Jordan von Quedlinburg2
- Josephus2
- Kamal al-Din ibn al-Humam2
- Kamāl al-Dīn Turkumānī2
- Leo I2