- Jiménez de Enciso family1
- Jiménez de Enciso, Andrés1
- Jiménez de Enciso, Diego1
- Jiménez de Enciso, Pedro1
- John, the Apostle, Saint1
- Juana, la Loca, Queen of Castile, 1479-15551
- Juana, of Austria, Princess of Portugal, 1535-15731
- Judaism1
- Judges--Selection and appointment1
- Julius III, Pope, 1487-15551
- Jāmiʻ al-Azhar1
- Land grants1
- Land tenure (Germanic law)1
- Land titles--Registration and transfer1
- Land use1
- Landlord and tenant1
- Law, Germanic1
- Law--Interpretation and construction1
- Lawyers1
- Leather doublures1