Former Owner
- 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
- Rudolph Feilding, 8th Earl of Denbigh1
- Rudolph Frederick Kelker3
- Rudolphus Rasser Donatus1
- Rugby School1
- Rush Hawkins2
- Rushton Mather Dorman1
- Ruth Cheney Streeter1
- Ruth E. Adomeit3
- Ruth Fowler Jarvis4
- S. Ereilter1
- S. S. Conant1