Name
- Primier, Ygnacio1
- Quiroga, Padre Joseph1
- Quiros, Pedro Fernandez, Captain1
- Rasquin, Jayme, Governor of Buenos Ayres1
- Risco, Marques del1
- Riva, Alonso de la1
- Robertson, William, Doctor1
- Rocamora, Christoval, Missionary1
- Rocha y Figueroa, Geronimo de la1
- Rodero, Gaspar, Padre1
- Roxas, Silvestre Antonio Diaz1
- Salaverria, Santiago, Don1
- San Antonio, Manuel, Fr1
- San Juan, Joseph Miguel1
- Santa Cruz, Alonso, Cosmografo Mayor1
- Santa Cruz, Juan Josef, Don1
- Santeliz es Pablo, Juan Eugenio1
- Santoyo, Alonso, author of an account of a journey by Jayme Rasquin, fl 15591
- Sarmiento de Gamboa, Pedro, Captain1
- Smyth, A-1