Former Owner
- Benoît Le Court1
- Bernard Rosenthal1
- Bernardi1
- Bernardo Bembo1
- Bernardo Mendel1
- Bertram Dobell1
- Betty Freudenheim1
- Bibliotheca Philosophica Hermetica1
- Bodleian Library1
- Boies Penrose II1
- Bonvesino, Marco1
- Boudewijn Willemszoon van Drenckwaert1
- Branners Bibliofile Antikvariat1
- Brick Row Book Shop1
- Bridget Hunt1
- Budapest University of Jewish Studies1
- Burg Kreuzenstein1
- Burndy Library1
- C.B1
- Caesareum Societatis Jesu Collegium Viennense1