- Abington, Mrs., 1737-1815 (Frances Barton),4
- Aboll, Joshua1
- Abraham (Biblical patriarch).1
- Abrahams, Israel, 1858-19251
- Académie de Paris. Facultés de médecine.2
- Accum, Friedrich Christian, 1769-18381
- Achilles (Mythological character)1
- Achilles (Mythological character),1
- Ackermann, Rudolph, 1764-1834.1
- Ackland, Henry W.2
- Acland, Thomas Dyke, Sir, 1787-18711
- Acoma Indians1
- Acoma pottery1
- Acord, Art, 1890-19311
- Acosta, Jose de, 1540-1600. De Novi Orbis natura et ratione4
- Acton, Eliza, 1799-18591
- Adair, James Makittrick1
- Adair, James, 1743?-1798,1
- Adair, Robert, Sir, 1763-18551
- Adam (Biblical figure)2