Fermín Francisco de Carvajal-Vargas

Fermín Francisco de Carvajal-Vargas y Alarcón, 1st Duke of San Carlos and Grandee of Spain (Chile, 1722 - Madrid, 1799) was a Spanish-Peruvian noble. He was the last Correo Mayor de Indias.

Portrait of Fermin Francisco de Carvajal Vargas

He was married at Cathedral of Lima on 11 June 1741 to his cousin Joaquina María Magdalena Brun y Carvajal. The couple had 4 children: Magdalena de Carvajal, later Marquise of Lara; Mariano Joaquín de Carvajal-Vargas, later 5th Count of Puerto; Diego Melchor de Carvajal-Vargas; and Luis Fermín de Carvajal, later 1st Count of La Unón.