- Jewish religious poetry1
- Jewish religious poetry, Judeo-Persian1
- Jewish wedding sermons1
- Jews--Conversion to Christianity1
- Jews--Education1
- Jews--Social life and customs1
- Jidd Ḥafṣī, ʻAlī ibn Luṭf Allāh, active 17th century-18th century1
- Jiménez de Cisneros, Francisco, 1436?-15171
- Job (Biblical figure)1
- John II, King of Aragon, 1397-14791
- John IV, King of Portugal, 1604-16561
- John Manuel, Prince of Portugal, 1537-15541
- John V, King of Portugal, 1689-17501
- John VIII Palaeologus, Emperor of the East, 1392-14481
- John the Baptist's Day1
- John, of Damascus, Saint1
- Joseph Della Reina, active 15th century1
- Juan II, King of Castile and Leon, 1405-14541
- Judaism (Christian theology)1
- Judaism--Apologetic works1