Author
- Jamāl al-Dīn Ḥaṣīrī2
- Jayakr̥ṣṇa2
- Jehiel ben Jekuthiel ben Benjamin Anav2
- Johann Herolt2
- Johannes Nider2
- John Mandeville2
- John Montgomery2
- John of Wales2
- Josef ibn Tabul2
- Joseph ben Gorion2
- Juana I of Castile2
- Judah Leib Pukhovitser2
- Judah Rosanes2
- Jérôme Lalande2
- Kauṇḍa Bhaṭṭa2
- Khalīl ibn Rasūl Sīnūbī2
- Khwaja Abdullah Ansari2
- Kāśīnātha Bhaṭṭācārya2
- Lactantius2
- Latîfî2