Former Owner
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Petrus Hofstede1
- Petrus Jensenius1
- Petrus Molitor1
- Petrus Ysermans1
- Petrus de Thureyo1
- Pettini Libraria di Antonio Pettini1
- Philibert-Charles-Marie Varenne de Fenille1
- Philip Augustus Hanrott1
- Philip C. Duschnes Rare Books & First Editions1
- Philip Carteret Webb1
- Philip Hurd1
- Philip Robinson1
- Philip Sills1
- Philip of the Palatinate1
- Philippe Desportes1
- Philippe Hurault de Cheverny1
- Philippe de Béthune1
- Piero Ginori Conti1