Former Owner
- Biblioteca del Seminario Arcivescovile1
- Bill Jackson1
- Bodleian Library1
- Bone, Michael1
- Bonvesino, Marco1
- Breslauer and Meyer1
- Brick Row Book Shop1
- Bruce P. Ferrini1
- Budapest University of Jewish Studies1
- Buxheim Charterhouse1
- C.J. Spence1
- Camillo Riccio1
- Carl Hermann Grabauer1
- Carleton Rubira Richmond1
- Carlo Bonaparte1
- Carlo Francesco Frasconi1
- Carlo Morbio1
- Cecil Deedes1
- Charles Alexander de Cosson1
- Charles Allen Munn1