Former Owner
- Baptist Union Theological Seminary1
- Bartolomeo di Larione Martelli1
- Battista di Ser Cicco di Fermo1
- Baḥrānī, Muḥammad ibn ʻAlī ibn Ḥaydar ibn Ḥasan ibn Ḥaydar1
- Benetto Spinelli1
- Bergendal Collection1
- Bernard M. Rosenthal2
- Bernard Quaritch Ltd3
- Bernardi1
- Bertram Ashburnham, 4th Earl of Ashburnham8
- Bet din tsedeḳ London ṿeha-medinah1
- Biblioteka Tulezynska1
- Bibliotheque Seminaire de Notre Dame de Puy1
- Bridget Hunt1
- Bristol Baptist College1
- Burndy Library1
- Buxheim Charterhouse3
- Bākīr ibn Muṣṭafá Fūṭī1
- Bālambhaṭṭamuni1
- C. Bruscoli1