Author
- Jayāditya2
- Jaʻfar ibn Khaḍir Janājī2
- Jehiel ben Jekuthiel ben Benjamin Anav2
- Joan Martines2
- John Cassian2
- John de Beauchesne2
- Jordan von Quedlinburg2
- Joseph ben Ephraim Karo2
- Juana I of Castile2
- Judah ben Saul ibn Tibbon2
- Julianus Pomerius2
- Julius II2
- Justin2
- Kalonymus ben Kalonymus2
- Kamalākara Bhaṭṭa2
- Kamalākarabhaṭṭa2
- Keśavācārya2
- Khaṭīb, ʻAlāʼ al-Dīn ibn ʻAbd al-Bāqī, fl. 15952
- Konrad III. von Soltau2
- Konrad von Brundelsheim2