[2] Familiarly linked to the court of the Kingdom of Spain, his family had held important positions; being his grandfather, his great-grandfather and his great-great-grandfather Sumiller de Corps of different kings.

He married on 3 April 1774, with María Ignacia Álvarez de Toledo y Gonzaga, daughter of Antonio Álvarez de Toledo y Osorio, 10th Marquess of Villafranca del Bierzo and two years later, his father died, thus inheriting his immense fortune.

Charles III appointed him, shortly after, governor of the Banco de San Carlos, the main bank in the country at the time.

He also finished the works on his Palacio de Altamira in Madrid, begun by his father and designed by Ventura Rodríguez.

After the Motín de Aranjuez, the new king Ferdinand VII confirmed him in his post, although for a short time, since months later, he fled to Bayonne.