- Aldobrandini, Giovanni degli1
- Aleramo, Marquis of Monferrato, -9671
- Alessandri, Alessandro degli1
- Alessandri, Niccolò degli1
- Alessandro, Pietro di1
- Alexander Balas, King of Syria, -145 B.C.1
- Alexander III, Pope, -11811
- Alexander, de Villa Dei. Doctrinale puerorum1
- Alexius, Saint1
- Alfonso V, King of Aragon, 1396-14581
- Alfonso X, King of Castile and Leon, 1221-12841
- Allegories1
- Alliata family1
- Almagest (Ptolemy)1
- Alphabets1
- Altars1
- Altoviti, Bartolomea1
- Amadori, Bartolomeo1
- Amadori, Niccolo1
- Amaracandrasūri, active 13th century. Kavyakalpalatā1