Former Owner
- Ada E. Moorhead Thomas1
- Adam Sim1
- Adam Weinberger Rare Books1
- Adam de Campigny1
- Adelbert Brownlow-Cust, 3rd Earl Brownlow1
- Adelrich Benziger1
- Adolphe Morlot1
- Adrian Van Sinderen1
- Adrianus David Schinkel1
- Adán Inquaci1
- Agnes Browne1
- Agnes Mongan1
- Alain Campbell White1
- Alan Noel Latimer Munby1
- Albert Figdor1
- Albert M. Patrick1
- Albert M. Todd1
- Albert Parker, 3rd Earl of Morley1
- Albert VII of Mansfeld1
- Alberto Govi1