- Jews--Dietary laws1
- Jews--Legal status, laws, etc.1
- Jews--Medicine4
- Jews--Persecutions1
- Ji bu--Bie ji lei--Ming8
- Ji bu--Bie ji lei--Song1
- Jiménez de Cisneros, Francisco, 1436?-15171
- Jiménez de Enciso family1
- Jiménez de Enciso, Andrés1
- Jiménez de Enciso, Diego1
- Jiménez de Enciso, Pedro1
- Joachim, Saint1
- John I, King of Portugal, 1357-14331
- John II, King of Aragon, 1397-14791
- John II, King of Portugal, 1455-14951
- John, King of England, 1167-12161
- John, the Apostle, Saint2
- Joseph (Son of Jacob)1
- Juana, la Loca, Queen of Castile, 1479-15552
- Juana, of Austria, Princess of Portugal, 1535-15731