Author
- Jacob HaLevi of Marvège1
- Jacobus de Burgo1
- Jacopo Piccolomini-Ammannati1
- Jacopone da Todi1
- Jacques Lempereur1
- Jaghmini1
- Jalāl al-Dīn al-Thīrī1
- James of Lausanne1
- James of Viterbo1
- Jamāl al-Dīn Aḥmad ibn Muḥammad Ẓāhirī1
- Jamāl al-Dīn Ḥaṣīrī1
- Jean Carteron1
- Jean de Lignieres1
- Jean de Meun1
- Joanna I of Naples1
- Johannes von Freiburg1
- John Gower1
- John Larry England1
- John de Mowbray, 2nd Baron Mowbray1
- John of Saxony1