Author
- Sebastian of Naples1
- Seifrit1
- Sextus Empiricus1
- Sextus the Pythagorean1
- Shem Tov ben Joseph ben Shem Tov Ibn Shem Tov1
- Shi Laifu1
- Shāṭibī, Muḥammad ibn al-Qaffāl, 13th cent1
- Sibawayh1
- Sidrac1
- Siena1
- Sigebert of Gembloux1
- Sigismund1
- Signoria of Florence1
- Simeon ben Zemah Duran1
- Simon Bredon1
- Simon of Cremona1
- Simon, "marchant parcheminier"1
- Simone d' Angelo1
- Simone di Nicolo Petroni1
- Siraj al-Din al-Bulqini1