The title Duke of the Infantado (spanisch Duque del Infantado) was granted to Diego Hurtado de Mendoza y Figueroa, son of Íñigo López de Mendoza, 1st Marquis of Santillana, by the Catholic Monarchs, Fernando II de Aragon and Isabel I of Castile, on 22 July 1475.

The Dukes of the Infantado remained an important family throughout the Spanish history.

Diego Hurtado de Mendoza built the New Castle of Manzanares el Real. Later the seat of the Dukes of the Infantado moved to the Palacio del Infantado in Guadalajara.

House of Mendoza

Diego Hurtado de Mendoza y Figueroa (1415/7–1479, 1. Duque del Infantado, Sohn von Íñigo López de Mendoza, Marqués de Santillana
Íñigo López de Mendoza y Luna, 2nd Duke of the Infantado (1438–1500)
Diego Hurtado de Mendoza, 3rd Duke of the Infantado (1461-1531), „El Grande“.
Íñigo López de Mendoza, 4th Duke of the Infantado (1493–1566).
Íñigo López de Mendoza, 5th Duke of the Infantado (1536–1601), grandson.
Ana de Mendoza, 6th Duchess of the Infantado (1554–1633), married Juán Hurtado de Mendoza de la Vega y Luna († 1624)
Rodrigo Díaz de Vivar Sandoval y Mendoza, 7th Duke of the Infantado (1614–1657), Viceroy of Sicily
Catalina Gómez de Sandoval y Mendoza, 8th Duchess of the Infantado (1616–1686), married Rodrigo Díaz de Vivar de Silva y Mendoza, 4th Duke of Pastrana.
Gregorio María de Silva y Mendoza, 9th Duke of the Infantado (1649–1693), 5th Duke of Pastrana, 7th Duke of Lerma.
Juan de Dios de Silva y Mendoza y Haro, 10th Duke of the Infantado (1672–1737), 6th Duke of Pastrana, 8th Duke of Lerma.
María Francisca de Silva Mendoza y Sandoval, 11th Duchess of the Infantado (1707–1770), married the Marquis of Távara.

Pedro de Alcántara Tellez Girón y Beaufort, 14th Duke of the Infantado (1810–1844).
Mariano Téllez Girón y Beaufort Spontin, 15th Duke of the Infantado (1814–1882)
Andrés Avelino de Arteaga y Silva Carvajal y Téllez Girón, 16th Duke of the Infantado (1833–1910)
Joaquín de Arteaga y Echague Silva y Méndez de Vigo, 17th Duke of the Infantado (1870–1947)
Íñigo de Arteaga y Falguera, 18th Duke of the Infantado (1905–1997).
Íñigo de Arteaga y Martín, 19th Duke of the Infantado (1941- ).

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