Former Owner
- Abbazia di San Domenico1
- Abbey of Saint-Germain-des-Prés1
- Abbey of Santa Giustina1
- Abbey of St. Vaast1
- Abbot von Heselwang1
- Abbé [Dourout]1
- Abraham Bracebridge1
- Abū al-Ḥasan Dallāl1
- Achille Genty1
- Achille Kühnholtz-Lordat1
- Acquired before February 1992 and probably in library for many decades.1
- Ada E. Moorhead Thomas1
- Adelbert Brownlow-Cust, 3rd Earl Brownlow1
- Adelrich Benziger1
- Adrian Van Sinderen1
- Adrianus David Schinkel1
- Adrienne Minassian1
- Adán Inquaci1
- Adʹham Nūrī Waṣfī1
- Agnes Browne1