Former Owner
- Otto Ege2
- Paolo Giovio2
- Richard Heber2
- Robert Garrett2
- Victor Christ2
- Wilfrid Voynich2
- Abbaye de Saint-Sulpice1
- Abbey of Morimondo1
- Acton Griscom1
- Adán Inquaci1
- Alain Campbell White1
- Alan Noel Latimer Munby1
- Albert C. Baugh1
- Alberto Govi1
- Alexander Boswell, Lord Auchinleck1
- Alfonso Cassuto1
- Alfred John Horwood1
- Algernon Percy, 10th Earl of Northumberland1
- Antiquarian Books of Boston1
- Antonio Laserna1