Martínez-Bordiú was the 2nd Duchess of Franco from July 2018[1] until revocation of her dukedom and associated grandeeship on 21 October 2022 as a result of the Democratic Memory Law.

Her maternal grandparents were the fascist dictator (caudillo) Francisco Franco, the Spanish Head of State at the time of her birth and for the next 24 years, and Carmen Polo y Martínez-Valdés, 1st Lady of Meirás.

[citation needed] The 21-year-old Martínez-Bordiú was married on 8 March 1972 in the Chapel of the Palace of El Pardo in Madrid to Prince Alfonso, Duke of Bourbon, elder son of Infante Jaime of Spain, Duke of Segovia, and grandson of King Alfonso XIII of Spain.

General Franco subsequently granted Prince Alfonso the title of Duke of Cádiz and the style of Royal Highness.

After separating from her first husband in 1979, Martínez-Bordiú lived with a Frenchman, Jean-Marie Rossi (18 November 1930 – 5 December 2021),[3] who was 20 years older than her.

Martínez-Bordiú then gave birth to her daughter, María Cynthia Francisca Matilda Rossi, in Paris on 28 April 1985.

On 18 June 2006 in Cazalla de la Sierra, Seville, she married a third time to a Spaniard, José Campos García (born in Santander), who was 13 years her junior.