- Altoviti, Giovanni.1
- Alvaro, Corrado, 1895-19561
- Alzano, Bartolommeo da, fl. 15001
- Amati, Giacinto, 1778-1850, author1
- Ameyden, Dirk, 1586-1656.1
- Andrea da Pistoia1
- Anghiera, Pietro Martire d’, 1457-15261
- Anselm, Saint, Archbishop of Canterbury, 1033-11091
- Antelmi, Bonifazio1
- Antoninus, Saint, Archbishop of Florence, 1389-14593
- Antonio Vallardi (Firm)1
- Antonio Zatta e figli1
- Anville, Jean Baptiste Bourguignon d', 1697-1782, cartographer.1
- Apuleius1
- Aragona, Tullia d', ca. 1510-15561
- Aretino, Pietro, 1492-155610
- Ariani, Jacopo (?)1
- Aristotle1
- Arp, Jean, 1887-19661
- Arrivabene, Andrea, fl. 1534-15701