Former Owner
- Robert Ranshaw1
- Robert S. Pirie1
- Robert Stayner Holford1
- Robert Villareal1
- Robert Wheeler Willson1
- Robert Wyer1
- Robert de Mol1
- Robson & Kerslake1
- Roderick Terry1
- Rodrigo de Abejos1
- Roger Martin1
- Rolls1
- Rosamond B. Loring1
- Ross R. DeVean1
- Rowland G. Hazard1
- Rowland Hazard1
- Rowland Oseley1
- Royal Library of Belgium1
- Royaumont Abbey1
- Rudolf Busch1