Former Owner
- Arthur Griffith1
- Arthur Hood, 1st Baron Hood of Avalon1
- Arthur Lee Loeb1
- Arthur M. Ellis1
- Arthur Thomas Bannister1
- Arthur de l'Isle du Dréneuc1
- Ashton Lever1
- Ashton Rollins Sanborn1
- Assemani family1
- Athelstan Riley1
- Audry Wilkens1
- Austin, Jehan1
- Avraham Yedidiah Levi1
- Avraham ben Yahya1
- B.C. Barker-Benfield1
- B.L. Riese1
- Baldasarre Boncompagni1
- Baptist Union Theological Seminary1
- Barbara Hackenmayrin1
- Barbarigo family1