The only daughter of Alexandre Aguado Las Marismas (1830-1893) and Marie-Emilie-Claire MacDonnell (1817-1905), the Duchess was born in 1847 and was married in 1866 to Adalbert de Talleyrand-Périgord (1837-1915), 6th Duke of Montmorency. From this marriage was born Louis de Talleyrand-Périgord, Duc de Montmorency (1867-1951). (http://books0977.tumblr.com/post/148592377672/carmen-aguado-duchesse-de-montmorency-1860)