- Jaʻbarī, Ibrāhīm ibn ʻUmar, 1242 or 1243-1331 or 1332. Wāḍiḥah fī tajwīd al-Fātiḥah1
- Jean, de Verdun1
- Jewish astronomy1
- Jewish ethics1
- Jewish ethics in literature1
- Jewish law1
- Jews--Legal status, laws, etc.1
- Jews--Persecutions1
- Jiří, z Poděbrad, King of Bohemia, 1420-14711
- Joannes de Caligariis1
- John, of Daylam1
- Juan II, King of Castile and Leon, 1405-14541
- Judaism--Customs and practices1
- Judaism--Liturgy1
- Jugurthine War (111-105 B.C.)1
- Jumʻah1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Taḥrīr al-qawāʻid al-manṭiqīyah1
- Justinian I, Emperor of the East, 483?-5651
- Jāmiʻ al-Muẓaffarī (Damascus, Syria)1
- Jāmiʻ al-Umawī al-Kabīr (Aleppo, Syria)1