Former Owner
- Sarrià Capuchins1
- Sather, Eugene E. (Eugene Earl), 1924-19861
- Schenck'sche Fide-Kommiss-Bibliothek1
- Schøyen Collection1
- Scroop Egerton, 1st Duke of Bridgewater1
- Sebastianus Severus1
- Sebastienne Boscher1
- Seitenstetten Abbey1
- Sephan de Perusio1
- Sewell Thomas1
- Seymour Stocker Kirkup1
- Seymour de Ricci1
- Silas W. Howland1
- Simhah Pinsker1
- Simon Jason Schwartz1
- Sion College1
- Sir Alexander Campbell1
- Sir Edward Dering, 1st Baronet1
- Sir Francis Powell, 1st Baronet1
- Sir George Holford1