- Jaghmīnī, Maḥmūd ibn Muḥammad, -1221?1
- Jaina cosmology1
- Jaina hymns, Prakrit1
- Jaina literature, Prakrit1
- Jaina mythology1
- Jaina philosophy1
- Jainism--Doctrines1
- James, the Greater, Saint1
- Japan1
- Japanese poetry1
- Jesuit drama, Spanish1
- Jewelry1
- Jewish ethics1
- Jewish families--Religious life1
- Jewish magic1
- Jewish religious poetry, Ladino1
- Jiménez de Cisneros, Francisco, 1436?-15171
- John II, King of Aragon, 1397-14791
- Joseph (Son of Jacob)1
- Juana, of Austria, Princess of Portugal, 1535-15731