Former Owner
- Sister Marghareta van den Spegher1
- Skinner Poulin1
- Sonnyng, John1
- Sonnyng, William1
- St Peter's Archabbey Salzburg1
- St. Andrew-on-Hudson1
- St. Mang's Abbey1
- St. Mary's College1
- St. Stephen's Abbey, Würzburg1
- Staatliche Museen zu Berlin1
- Stanley Morison1
- Stefano Scarella1
- Stephen Butler Rare Books & Manuscripts1
- Stiftsbibliothek Kremsmünster1
- Sébastien de Rosmadec, marquis de Molac1
- T. Royer1
- T. Triphook1
- T. Whitcombe Greene1
- That Guy with the Books1
- Theodore Williams1