- Agricola, Georg, 1494-1555.1
- Agricola, Rodolphus, 1443?-14851
- Ahearn, William F1
- Aitken, Robert, 1735-18021
- Albertus, Magnus, Saint, 1193?-12802
- Alcala, Pedro de, fl. 15051
- Aldington, Richard, 1892-19621
- Alechinsky, Pierre, 1927-2
- Alessandri, Caio Baldassare Olimpo, b. 1486?1
- Aliamet, Jacques, 1726-17881
- Allen and West, bookseller1
- Alvord, Corydon A., ca. 1812-1874, printer1
- Amerbach, Basilius, 1488-15352
- Amerbach, Bruno, 1485-1519.2
- American Irrigation Federation2
- Amfiteatrov, Aleksandr, 1862-19381
- Amman, Jost, 1539-15911
- Andersen, H. C. (Hans Christian), 1805-1875.1
- Anderson, Alexander, 1775-18703
- Anderson, Isabel, 1876-19485