Former Owner
- Qāsim al-Īrawānī1
- Ramsau Monastery1
- Raoul Chandon de Briailles1
- Rashīdī, Ibrāhīm1
- Renzo Rizzi libri antichi1
- Ricardo Enrico de Wilde1
- Richard Coffin1
- Richard James Horatio Gottheil1
- Richard N. Frye1
- Richard Wroe1
- Robert B. Honeyman1
- Robert Elyot1
- Robert Garrett1
- Robert Lyle1
- Rudolf Busch1
- Rudolf Graupner1
- Saeed Nafisi1
- Sam Fogg Rare Books & Manuscripts1
- Samuel Petit1
- Samuel William Ogg, Major-General1