Pedro de Alcántara Téllez-Girón, 9th Duke of Osuna, was born in Madrid on August 8, 1755, son of Pedro Zoilo Téllez-Girón and Pérez de Guzmán, 8th Duke of Osuna (1728-1787), and María Vicenta Pacheco Téllez -Giron (h. 1725- ¿?). He married in the Madrid parish of San Pedro el Real, on December 29, 1771, with María Josefa