Former Owner
- R. H. Fenn1
- R. Stora and Company1
- Raoul Léonor Lignerolles1
- Renzo Rizzi libri antichi1
- René Antoine Thoué1
- Rev. Frederick Collins Wilson1
- Ricardo, Conde de Benahavis Heredia1
- Richard Bennett1
- Richard Heber1
- Richard Sackville1
- Robert Branthwait1
- Robert H. Sayre1
- Robert Lyle1
- Robert de Hangest1
- Rudolf Busch1
- Rush Hawkins1
- Rushton Mather Dorman1
- Ruth Cheney Streeter1
- Sabin1
- Sabina Sopheija Behren1