Author
- Richard of Middleton1
- Roberto Caracciolo1
- Rocca, Antonio1
- Rutilius Taurus Aemilianus Palladius1
- Sebastian of Naples1
- Sextus the Pythagorean1
- Simon de Lenis1
- Stefano Fieschi1
- Stephanus Hugoneti1
- Taddeo Alderotti1
- Theophrastus1
- Thomas Waleys1
- Thomas of Capua1
- Thomas of Celano1
- Tibullus1
- Torelli family1
- Umbertus Decembrius1
- Urban VII1
- Urban VIII1
- Urso of Calabria1