Former Owner
- Robert Neville1
- Robert Ranshaw1
- Robert S. Pirie1
- Robert Stayner Holford1
- Robson & Kerslake1
- Rolls1
- Rosamond B. Loring1
- Ross Winans1
- Rudolf Busch1
- Rudolph Feilding, 8th Earl of Denbigh1
- Rudolph Frederick Kelker1
- Rudolphus Rasser Donatus1
- Rugby School1
- Rush Hawkins1
- Rushton Mather Dorman1
- Ruth Cheney Streeter1
- Sabin1
- Saeed Nafisi1
- Saluti, Tomasso, active 20th century1
- Samuel Claggett Chew1