Don Cristóbal Martínez-Bordiú y Ortega, 10th Marquess of Villaverde (1 August 1922 – 4 February 1998) was a Spanish aristocrat, the son-in-law of dictator Francisco Franco, and a heart surgeon.

Born as Cristóbal Martínez y Bordiú, he was one of four children of José María Martínez y Ortega (Jaén, Mancha Real, 24 October 1890 – Mancha Real, 10 November 1970) and wife (m. Sabiñán, 2 February 1918) María de la O Esperanza Bordiú y Bascarán (Madrid, 19 December 1896 – Mancha Real, 12 December 1980), 7th Countess of Argillo.

This wedding brought him high social status in the Spain of General Franco.

He was jokingly nicknamed the Yernísimo, in a clear reference to the title of Generalísimo of his father-in-law (yerno in Spanish means son-in-law, although in proper Spanish grammar the suffix -ísimo can only be added to certain adjectives to indicate "more than", but it can never be used with nouns).

A popular joke was that Villaverde killed more in La Paz (the hospital where he worked, and translating to The Peace) than his father-in-law in the war.