Author
- Seneca the Elder1
- Sensatus1
- Serapion the Younger1
- Sextus Empiricus1
- Sextus the Pythagorean1
- Shelomo Suleiman Al-Sanjary1
- Shem Tov ben Abraham ibn Gaon1
- Sidonius Apollinaris1
- Sidrac1
- Simon de Lenis1
- Stephanus Hugoneti1
- Stephen Langton1
- Sulaymān Ḥikmatī1
- Sylvester II1
- Syriac Orthodox Church1
- Taddeo Alderotti1
- Tartaleoni family1
- Theobaldus Episcopus1
- Theodore of Mopsuestia1
- Thomas Waleys1