Author
- Robert de Saint-Martin1
- Robert of Gloucester1
- Roger Alban1
- Roger Bigod, 2nd Earl of Norfolk1
- Roman Rota1
- Royal Audiencia of Lima1
- Royal Chancellery of Granada1
- Rui de Pina1
- Saʻdī, Shams al-Dīn Muḥammad1
- Sebastian of Naples1
- Sharif al-Murtadha1
- Shelomoh ben Eliyah ha-Melamed1
- Sidrac1
- Solomon ibn Verga1
- Spanish Council of State1
- Sulayman al-Hawwat1
- Sulpicius Severus1
- Süleyman Faik1
- Tartaleoni family1
- Thomas Smith1