- Jiménez de Cisneros, Francisco, 1436?-15171
- John II, King of Aragon, 1397-14791
- Juana, of Austria, Princess of Portugal, 1535-15731
- Juana, of Austria, Princess of Portugal, 1535-1573--Correspondence1
- Justa, Saint, -approximately 2871
- Kekchi language1
- Knights of Malta1
- Ladron de Guevara family1
- Land grants1
- Landowners1
- Latin language1
- Latin language--Study and teaching1
- Latin poetry1
- Laudatory poetry, Latin1
- Leather bindings1
- Legal documents1
- Lemos, Pedro Fernández Ruiz de Castro y Osorio, conde de, active 17th century1
- Lemos, Pedro Fernández de Castro, conde de, 1576-16221
- Leocadia, Saint, -3031
- Letter of Aristeas1