Former Owner
- Stephen Penny1
- Stevens Henry Newton3
- Stiftsbibliothek Kremsmünster1
- Suleiman Alchorani1
- Swarthmore College2
- Sydney Cockerell22
- Süleyman Çelebi1
- Sāmaganārāyaṇabhaṭṭa1
- Sītārāma1
- Talcott Williams2
- Tammaro De Marinis1
- Taqī ibn ʻAlī al-Qummī1
- Theodore William John Wylie1
- Theodorico de Buckinstorff1
- Thomas Bateman2
- Thomas Bernardinus Braccioli1
- Thomas Corser1
- Thomas Devynysh1
- Thomas FitzRoy Phillipps Fenwick7
- Thomas G. Bergin1