Former Owner
- Pius VI1
- Prince Augustus Frederick, Duke of Sussex1
- Rafael Gomes1
- Raffaello de’ Medici1
- Raphael Nathan Nata Rabinowitz1
- Raphael de Mediolano1
- Reiss & Son1
- Renzo Rizzi libri antichi1
- Richard Bennett1
- Richard McKeon1
- Rinaldo Ridolfini1
- Robert B. Honeyman1
- Robert Brodhead Honeyman1
- Robert S. Pirie1
- Robert Villareal1
- Roger Martin1
- Ross Winans1
- Rudolf Graupner1
- Rush Hawkins1
- Ruth E. Adomeit1