Author
- Serapion the Younger1
- Sextus Empiricus1
- Shakalya1
- Somadaivajña (Son of Rudrabhaṭṭa)1
- Sriharsha1
- Svapneśvara1
- Svayamprakāśayati1
- Sylvester II1
- Theobaldus Episcopus1
- Thomas Aquinas1
- Thomas of Capua1
- Trimallabhaṭṭa1
- Tryambaka Māṭe1
- Tryaṃbaka (Son of Nārāyaṇa)1
- Udayaṅkara1
- Ujjvaladatta1
- Upaniṣadbrahmayogi1
- Urbanus Rhegius1
- Uvaṭa1
- Vaidyadevīcandra1