Juan Velasco de la Cueva y Pacheco (Madrid, 1608 - 1652), VIII Count of Siruela, was a Spanish noble, diplomat and Governor of the Duchy of Milan.
He was a son of Gabriel de Velasco y la Cueva and Victoria Pacheco, and was baptized on 11 October 1608 the parish church of Santiago in Madrid.
Loyal to the Count-Duke of Olivares, King Philip IV appointed him the following year ambassador to the Republic of Genoa, replacing Francisco de Melo.
During his term in office, he renewed with their authorities a previous treaty that allowed the passage of Spanish troops through their territory and began talks with Prince Thomas Francis of Savoy.
[2] Back in Madrid that same year, he was named gentleman of the King's Chamber, but he never again held any other political office in the service of the Spanish Monarchy.