Martín Juan de Castejón y Medrano

His father Martín was the IV Lord of the town of Velamazán, VII of Ibiernas, and of the Strong House of Arias in the lordship of Molina.

Martín de Medrano made his will in Agreda, through a closed document, on December 8, 1636, formalized by the scribe Juan Fraile.

From the historical data that remain about it, it is known that it had a castle, which served as defense against the invasions suffered by Navarre from the Castilians, and that in 1244 it was owned by Guillermo Pérez de Castejón, who is the first known bearer of this surname.

He was aided by Don Pedro Velaz de Medrano, II Lord of Tabuérniga, who commanded his Tercio from Alava in the Franco-Spanish war.

Martín Juan made his will through a power of attorney granted to his wife Angela de Belvis on May 1, 1647, before the scribe of Agreda, Diego Pérez.

[6][7] Martín Pedro González de Castejón Belvís e Ibáñez acquired the Marquessate of Lanzarote through a ruling by the Council of Castile on 14 March 1729.

The decision, based on the Laws of Toro, granted him possession of these mayorazgos, which included the Marquessate of Lanzarote, along with all associated properties, revenues, and rents accrued since the death of Leonor Duque de Estrada, up until their formal transfer and restitution.

He married twice: From his second marriage, he had two children: The famed 17th-century Marquess of Velamazán Palace is situated between Berlanga de Duero and Almazán.

Restored entirely, the rural house on the western side of the palace retains its original marble fireplace within a spacious lounge where successive marquises once unwound, until the final one sold the estate to local villagers in the early 20th century, subdividing it into multiple residences.

To the south, the primary Renaissance-style balcony facade boasts a sizable stone-carved coat of arms depicting the family insignia, alongside a sundial bearing the engraved date of 1619.