- Jacopo, Giovanni di1
- Jaghmīnī, Maḥmūd ibn Muḥammad, -1221?1
- Jamʻ al-jawāmiʻ fī al-uṣūl (Subkī, Tāj al-Dīn ʻAbd al-Wahhāb ibn ʻAlī)3
- Japan1
- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah3
- Jaʻbarī, Ṣāliḥ ibn Thāmir, d. 1306. Naẓm al-laʼālī2
- Jean, de Verdun1
- Jerome, Saint, -419 or 4208
- Jesus Christ41
- Jewelled bindings1
- Jewish Rebellion (66-73 A.D.)2
- Jewish astronomy8
- Jewish calendar3
- Jewish ethics6
- Jewish ethics in literature1
- Jewish law12
- Jewish magic3
- Jewish philosophy12
- Jewish religious poetry1
- Jewish religious poetry, Hebrew1