Former Owner
- Rudolph Frederick Kelker3
- Rudolphus Rasser Donatus1
- Rush Hawkins1
- Ruth E. Adomeit3
- Ruth Fowler Jarvis4
- S. Ereilter1
- S. S. Conant1
- Sabin1
- Sabina Sopheija Behren1
- Saint Mihiel Abbey1
- Saint-Amand Abbey1
- Saint-Riquier1
- Sam Fogg Rare Books & Manuscripts2
- Samuel Addington1
- Samuel Allan1
- Samuel Allen4
- Samuel Butler1
- Samuel Eliot1
- Samuel Frederick Houston1
- Samuel H. Putnam1