Former Owner
- Paul Gottschalk1
- Paul Grinke1
- Paul Gruel1
- Paul Joseph Sachs1
- Paul Louis Feiss1
- Paul Viollet1
- Pauline Fore Moffitt1
- Pedro García de Montoya1
- Petrus Giraud1
- Petrus Hofman Peerlkamp1
- Petrus Hofstede1
- Petrus Molitor1
- Pettini Libraria di Antonio Pettini1
- Philadelphia Rare Books & Manuscripts Company1
- Philip Augustus Hanrott1
- Philip C. Duschnes1
- Philip C. Duschnes Rare Books & First Editions1
- Philip Kerr, 11th Marquess of Lothian1
- Philip Robinson1
- Philip van Alfen1