Former Owner
- Robert Manning Strozier Library1
- Robert Neville1
- Robert Ranshaw1
- Robert S. Pirie1
- Robert Stayner Holford1
- Robert Wheeler Willson1
- Robson & Kerslake1
- Rolls1
- Rosamond B. Loring1
- Ross R. DeVean1
- Ross Winans1
- Rowland G. Hazard1
- Royal Library of Belgium1
- Rudolf Busch1
- Rudolph Feilding, 8th Earl of Denbigh1
- Rudolph Frederick Kelker1
- Rugby School1
- Rush Hawkins1
- Ruth Cheney Streeter1
- Sabin1