- Akrel, Fredrik,1748-18041
- Albergaria, Lopo Soares de, approximately 1453-approximately 15321
- Albers, Paul1
- Albin, John, active 1791-18001
- Alden, William C. (William Clinton), 1871-19591
- Alexander, Scott C.1
- Allard, Carel, 1648-approximately 17091
- Allen, Charles Julius,1840-19151
- Allen, George (Engraver)1
- Allen, James, 1806-18461
- Allen, R. C. (Rolland Craten), 1881-19481
- American Automobile Association1
- American Baptist Mission Press1
- American Board of Commissioners for Foreign Missions1
- American Express Company1
- American Union Telegraph Company1
- Amundson, H. C1
- Amy, M. S. (Surveyor)1
- Anderson, A. H. (Andrew H.)1
- Anderson, D.H. (Geologist)1