Former Owner
- Philippe de Béthune1
- Phillip J. Pirages Fine Books & Manuscripts30
- Phoebe Hearst1
- Phyllis Walter Goodhart Gordan10
- Pierleone Leoni2
- Piero Ginori Conti2
- Pierre Fraenkel1
- Pierre Gorman1
- Pierre Gélis-Didot2
- Pierre Picard le Jeune1
- Pierre Pithou2
- Pierre Tassel1
- Pierre de La Vacherie1
- Pietro1
- Pietro Antonio Crevenna4
- Pietro Bembo1
- Pietro Canal1
- Pietro Civaleri1
- Pietro Giometti1
- Pietro Girometti1