Former Owner
- Raoul Léonor Lignerolles1
- Renzo Rizzi libri antichi1
- René Antoine Thoué1
- Rev. Frederick Collins Wilson1
- Ricardo, Conde de Benahavis Heredia1
- Richard Bennett1
- Richard Heber1
- Richard Priestley1
- Richard Sackville1
- Robert Branthwait1
- Robert Brodhead Honeyman2
- Robert Forrer2
- Robert Garrett5
- Robert H. Sayre1
- Robert Hoe III45
- Robert Lyle1
- Robert Mignan1
- Robert de Hangest1
- Ross Winans2
- Rudolf Busch1