Alejandro María Aguado, 1st Marquis of the Guadalquivir Marshes

Alejandro María Aguado y Remírez de Estenoz, 1st Marquess of Marismas del Guadalquivir (29 June 1784, in Sevilla – 14 April 1842, in Gijón), was an influential Spanish banker in the nineteenth century.

He was exiled in 1815, and immediately started business as a commission-agent in Paris, where, chiefly through his family connexions in Havana and Mexico, he acquired in a few years enough wealth to enable him to undertake banking. The Spanish government gave him full powers to negotiate the loans of 1823, 1828, 1830 and 1831; and Ferdinand VII rewarded him with the title of Marquess of Marismas del Guadalquivir, the decorations of several orders and valuable mining concessions in Spain. Aguado also negotiated the Greek loan of 1834. In 1828, having become possessed of large estates in France, including the Château Margaux, famous for its wine, he was naturalized as a French citizen. He died in Spain on 14 April 1842, leaving a fortune computed at 60,000,000 francs, and a splendid collection of pictures which at his death was sold by auction.