Don Mariano Joaquin de Carvajal y Vargas, 2. Duque de San Carlos 16 Jul 1741 Lima - 23 Apr 1796 (1741–1796) Parents Joaquina Ana Brun, 7.Condesa de Castillejo Fermin Francisco de Carvajal y Vargas, 1.Duque de San Carlos Children José Miguel de Carvajal-Vargas, 2nd Duke of San Carlos