- Alfasi, Isaac ben Jacob, 1013-11031
- Alfonso I King of Asturias, 693-7561
- Alfonso III, King of Asturias and Leon, approximately 848-approximately 9101
- Alfonso V, King of Aragon, 1396-14581
- Alfonso V, King of Asturias and León, 994-1027 or 10281
- Alfonso VI, King of Castile and Leon, 1030-11091
- Alfonso VII, The Emperor, King of Castile, 1104-11571
- Alfonso VIII, King of Castile, 1155-12141
- Allegory1
- Almanacs1
- Alphabets1
- Altoviti, Bartolomea1
- Alvarez family1
- Amadori, Bartolomeo1
- Amadori, Lorenzo1
- Amadori, Niccolo1
- Amulets1
- Ana, Queen, consort of Philip II, King of Spain, 1549-15801
- Anaya, Pedro1
- Andrea, Michele di1