- Akif Paşa, 1787-18451
- Alba, Fernando Alvarez de Toledo, duque de, 1507-15821
- Albigenses1
- Albizzi, Costanza1
- Aleramo, Marquis of Monferrato, -9671
- Alexander III, Pope, -11811
- 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
- Almucantar1
- Alphabets1
- Amadori family1
- Amadori, Francesco1
- Amelius, Martyr1
- Amicus, Martyr1
- Ana, Queen, consort of Philip II, King of Spain, 1549-15801