- Italy--Tuscany1
- Japan1
- Jesuits1
- Jewish children1
- Jewish women1
- Jews, Italian1
- Jews--Politics and government1
- Jews--Social life and customs1
- John IV, King of Portugal, 1604-16561
- John Manuel, Prince of Portugal, 1537-15541
- John V, King of Portugal, 1689-17501
- Juana, of Austria, Princess of Portugal, 1535-15731
- Judaism--Doctrines1
- Judaism--Liturgy1
- Judges (Islamic law)1
- Kings and rulers--Religious aspects1
- Kirmānī, Maḥmūd ibn Muḥammad, 1329?-1404 or 1405. Farāʼiḍ al-ījāz1
- Ladron de Guevara family1
- Lafões, Pedro Henrique de Bragança, Duque de, 1718-17611
- Law1