Former Owner
- Robson & Kerslake1
- Roderick Terry1
- Rodrigo de Abejos1
- Roger Martin1
- Roger North, 2nd Baron North1
- Rolls1
- Rosamond B. Loring2
- Ross R. DeVean1
- Ross Winans2
- Rowland G. Hazard1
- Rowland Hazard1
- Rowland Oseley1
- Roy G. Fitzgerald1
- Royal Library of Belgium1
- Royal Monastery of Saint Mary of Guadalupe1
- Royaumont Abbey1
- Rudolf Busch2
- Rudolf Graupner1
- Rudolf Hofmeister1
- Rudolph B. Gottfried1