Former Owner
- Riddagshausen Abbey1
- Rinaldo Ridolfini1
- Robert Branthwait1
- Robert Brodhead Honeyman4
- Robert Charles Winthrop1
- Robert Davies4
- Robert Elyot1
- Robert Forrer1
- Robert Fyncham1
- Robert Garrett19
- Robert H. Sayre1
- Robert Hoe III61
- Robert Lehman5
- Robert Neville1
- Robert Ranshaw1
- Robert Rossiter Hutton1
- Robert S. Pirie1
- Robert Samuel Turner1
- Robert Treswell1
- Robert Villareal1