Former Owner
- Raffaello de’ Medici1
- Raphael Nathan Nata Rabinowitz1
- Raphael de Mediolano1
- Reiss & Son1
- Renzo Rizzi libri antichi1
- Ricardo Enrico de Wilde1
- Richard Bennett1
- Richard Heber7
- Richard Henry Wilde1
- Richard McKeon1
- Richard Priestley1
- Rinaldo Ridolfini1
- Robert B. Honeyman1
- Robert Brodhead Honeyman4
- Robert Garrett3
- Robert Hoe III8
- Robert Lenkiewicz1
- Robert Oppenheim1
- Robert S. Pirie1
- Robert Villareal1