Former Owner
- Ricardo, Conde de Benahavis Heredia1
- Richard Bennett1
- Richard Firth Green1
- Robert Brodhead Honeyman2
- Robert Churchill1
- Robert Garrett6
- Robert H. Sayre1
- Robert Hoe III27
- Robert de Hangest4
- Robson & Kerslake1
- Ross R. DeVean1
- Ross Winans1
- Roy G. Fitzgerald1
- Royaumont Abbey1
- Rudolf Busch1
- Rudolph Frederick Kelker1
- Rushton Mather Dorman2
- Ruth E. Adomeit1
- Ruth Fowler Jarvis2
- S. Ereilter1