Former Owner
- Sonnyng, John1
- Sonnyng, William1
- St. Emmeram's Abbey1
- St. Matthias' Abbey1
- St. Maximin's Abbey1
- Stanley Morison1
- Stiftsbibliothek Kremsmünster1
- Sébastien de Rosmadec, marquis de Molac1
- T. Triphook1
- Talcott Williams1
- Tammaro De Marinis1
- That Guy with the Books1
- Theodor Cramer-Klett1
- Theodore Parker1
- Thomas Bernardinus Braccioli1
- Thomas Blayds1
- Thomas E. Marston1
- Thomas Edwards1
- Thomas F. Richardson1
- Thomas Gage1