Former Owner
- Paurāṇika, Rāmacandrabhaṭṭa1
- Payne and Foss1
- Payre-Grolée-Virville family1
- Pazzi family1
- Pease, John William, 1820-19001
- Pedro García de Montoya1
- Penzance Library1
- Perceval Lucas1
- Percy Mordaunt Barnard3
- Peretz ben Yehuda Mintz Ashkenazi1
- Peter Arrell Brown Widener2
- Peter Arrell Brown Widener II2
- Peter Christos1
- Peter Eaton2
- Peter Le Neve3
- Peter Ludwig4
- Peterborough Central Library1
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Petrus Hofstede1