Former Owner
- Peter Arrell Brown Widener II2
- Peter Le Neve2
- Peter Ludwig3
- 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
- Philip C. Duschnes2
- Philip C. Duschnes Rare Books & First Editions1
- Philip Carteret Webb1
- Philip Hofer3
- Philip Hurd1