Creator
- Alessandro degli Angeli1
- Alexander, de Villa Dei4
- Alfonso X, King of Castile and Leon, 1221-12841
- Amalarius, Archbishop of Lyon, approximately 775-approximately 8501
- Amboise, Catherine d', 1481?-1550.1
- Ambrose, Saint, Bishop of Milan, d. 3975
- Ambrosiaster1
- Anastasius, Sinaita, Saint, active 640-7001
- Anaximenes, of Lampsacus1
- Andrea da Pistoia1
- Angela, of Foligno, 1248?-13091
- Angeli, Alessandro degli3
- Angelus, Johannes, 1463-15121
- Anselm, Saint, Archbishop of Canterbury, 1033-11091
- Antelmi, Bonifazio1
- Antoninus, Saint, Archbishop of Florence, 1389-14594
- Apollonius, of Tyana1
- Aquila, Romanus1
- Arator, Subdiaconus, fl. 513-5441
- Archiconfraternita dei SS. Ambrogio e Carlo dei Lombardi1