- Requesens, Giuseppe de'1
- Requesens, Ludovico de'1
- Requesens, Luigi de'1
- Requesens, Salvatore Francesco de'1
- Requesens, Salvatore de'1
- Requesens, Vincenzo de'1
- Roderick, King of the Visigoths, -711?1
- Rodriguez, Ysabel1
- Rodríguez, Sebastián, 1896-19681
- Romances, Spanish1
- Ros Pelayre, Miguel1
- Rufina, Saint, -approximately 2871
- Salt industry and trade--Law and legislation1
- Sancho Garcés I, King of Navarre, -9251
- Sancho IV, King of Castile and Leon, 1257-12951
- Seals (Numismatics)1
- Sepúlveda, Juan Ginés de, 1490-15731
- Silver clasp plates1
- Slavery1
- Societies1