- John VIII Palaeologus, Emperor of the East, 1392-14481
- Joseph (Son of Jacob)1
- Juana, la Loca, Queen of Castile, 1479-15551
- Juana, of Austria, Princess of Portugal, 1535-15733
- Judaism2
- Judaism--Ari rite1
- Judaism--Customs and practices1
- Judaism--Prayers and devotions1
- Judeo-Arabic language1
- Judeo-Arabic literature2
- Judeo-Persian language1
- Judges1
- Judgment Day (Islam)2
- Judicial process (Islamic law)1
- Julius III, Pope, 1487-15551
- Jurisprudence1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Miṣbāḥ fī sharḥ al-Miftāḥ3
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Sharḥ mushkilāt al-Kashshāf1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Ḥikmat al-ʻayn1
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Taḥrīr al-qawāʻid al-manṭiqīyah1