Former Owner
- Reiss & Son1
- Renzo Rizzi libri antichi1
- Ricardo Enrico de Wilde1
- Richard Bennett1
- Richard Henry Wilde1
- Richard Priestley1
- Rinaldo Ridolfini1
- Robert Brodhead Honeyman1
- Robert Lenkiewicz1
- Robert S. Pirie1
- Ross Winans1
- Rush Hawkins1
- Ruth E. Adomeit1
- Saluti, Tomasso, active 20th century1
- Samuel Allan1
- Samuel David Luzzatto1
- Samuel P. Avery Jr.1
- Samuel Petit1
- Samuel Putnam Avery1
- Samuel Whitaker Pennypacker1