Former Owner
- Benoît Le Court1
- Bentley Lyonel John Tollemache, 3rd Baron Tollemache1
- Bergendal Collection1
- Bern Dibner1
- Bernard M. Rosenthal2
- Bernard Quaritch Ltd1
- Bertram Ashburnham, 4th Earl of Ashburnham18
- Bet din tsedeḳ London ṿeha-medinah3
- Betty Freudenheim1
- Bhaṭṭaṃbhaṭṭa1
- Biblioteca Bottigella1
- Biblioteca Trivulziana1
- Bibliotheca Beggadorum1
- Bibliotheca Philosophica Hermetica1
- Bill Jackson1
- Boies Penrose1
- Boies Penrose II1
- Bonvesino, Marco1
- Brayton C. Ives1
- Breslauer and Meyer1