Former Owner
- Percy Mordaunt Barnard1
- Petrus Jensenius1
- Petrus Leonardus1
- Petrus Martinotius1
- Petrus Ysermans1
- Pierre Gélis-Didot1
- Pierre Pithou1
- Preston A. Perry1
- Pîrîzâde, Sayyid ʻAbd Allāh, Shaykh al-Islām1
- Ralph Thoresby1
- Raphael de Mediolano1
- René Antoine Thoué1
- René Henry1
- Richard Hooker1
- Robert H. Sayre1
- Royaumont Abbey1
- Rush Hawkins1
- S. S. Conant1
- Sabin1
- Samuel Wix1