María del Rosario Cayetana Fitz-James Stuart y Silva, 18th Duchess of Alba GE was one of the most senior aristocrats in Spain, as well as the most titled aristocrat in the world, a record now held by Princess Victoria of Hohenlohe-Langenburg, 20th Duchess of Medinaceli.

Jacobo Fitz-James Stuart y Falcó, 17th Duke of Alba, 10th Duke of Berwick, GE was a Spanish peer, diplomat, politician, art collector and Olympic medalist. He was one of the most important aristocrats of his time and held, among other titles, the dukedoms of Alba de Tormes and Berwick, the Countship of Lemos, Lerín, Montijo and the Marquessate of Carpio. He was granted the Order of the Golden Fleece of Spain in 1926.