Former Owner
- Oliver R. Barrett1
- Oric Bates1
- Otto Ege1
- Paul Gottschalk1
- Paul Louis Feiss1
- Paul Riant1
- Pease, John William, 1820-19001
- Petrus Jensenius1
- Petrus Leonardus1
- Petrus Martinotius1
- Petrus Ysermans1
- Philip Carteret Webb1
- Philippe de Béthune1
- Pierre Fraenkel1
- Pierre de La Vacherie1
- Pietro1
- Pietro Odescalchi1
- Prieuré Saint-Louis de Poissy1
- Prince Augustus Frederick, Duke of Sussex1
- Rafael Gomes1