Former Owner
- Paul de Berthou1
- Pauline Fore Moffitt1
- Paulus de Graecus1
- Paurāṇika, Rāmacandrabhaṭṭa1
- Pazzi family1
- Pease, John William, 1820-19001
- Pedro García de Montoya1
- Peretz ben Yehuda Mintz Ashkenazi1
- Peterborough Central Library1
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Petrus Hofstede1
- Petrus Jensenius1
- Petrus Leonardus1
- Petrus Martinotius1
- Petrus Ysermans1
- Pettini Libraria di Antonio Pettini1
- Philadelphia Museum of Art1
- Philadelphia Rare Books & Manuscripts Company1
- Philip Augustus Hanrott1