- Alanus, de Insulis, d. 12021
- Albert Saifer, Publisher (Philadelphia, Pennsylvania)1
- Albertano, da Brescia, 13th cent1
- Albertus, Magnus, Saint, 1193?-12804
- Alcinous, fl. 2nd cent1
- Alderotti, Taddeo, 1223-12951
- Alexander Defense Committee (New York, New York)1
- Alexander, de Villa Dei8
- Algren, Nelson, 1909-19811
- Allen, Edward Jay, 1830-19151
- Alston, Tobias, 1620-ca.1639.1
- Amboise, Catherine d', 1481?-1550.1
- Ambrose, Saint, Bishop of Milan, d. 3975
- American Council of Christian Churches (New York, New York)1
- American Horse, Dakota Chief, 1840-19081
- Anaximenes, of Lampsacus1
- Anderson, Thomas McArthur, 1836-19173
- Andrea da Pistoia1
- Andrews, Charles Bartlett, 1836-19023
- Angela, of Foligno, 1248?-13091