Former Owner
- Acton Griscom5
- Ada E. Moorhead Thomas1
- Adam Clarke2
- Adam Samuel Thebesius1
- Adam Sim1
- Adam de Campigny1
- Adelbert Brownlow-Cust, 3rd Earl Brownlow1
- Adelrich Benziger1
- Admont Abbey2
- Admont Abbey Library1
- Adolph Sutro14
- Adolphe Lefrancq1
- Adolphe Morlot1
- Adrian Van Sinderen1
- Adriana R. Salem4
- Adrianus David Schinkel1
- Adrienne Minassian1
- Adʹham Nūrī Waṣfī1
- Agnes Browne1
- Aharon ben Zachariah Friedenthal1