Don Gonzalo, Duke of Aquitaine (5 June 1937 – 27 May 2000) (Spanish: Gonzalo Víctor Alfonso José Bonifacio Antonio María y Todos los Santos de Borbón y Dampierre; French: Gonzalve Victor Alphonse Joseph Boniface Antoine Marie Toussaint de Bourbon) was a grandson of Alfonso XIII, King of Spain.

Gonzalo was born in the Sant'Anna Clinic in Rome,[1] the younger son of Infante Jaime, Duke of Segovia and of his first wife, Emmanuelle de Dampierre.

In November 1961, Alfonso and Gonzalo, concerned that their father was wasting away his money, sought an injunction from a French court to compel him to turn over management of his affairs to a court-appointed trustee,[10] being supported in their action by their grandmother, Queen Victoria Eugenie, as well as by other members of the Spanish royal family.

In January 1962, the court ruled that although there were insufficient grounds to find Jaime completely incompetent, a trustee was installed to restrain undue extravagance on his part.

On 28 January 1983, at Puerto Vallarta, Mexico, Gonzalo civilly wed María del Carmen Harto y Montealegre (born 23 April 1947 in Toledo).

After his grandfather's death and the accession of his father Jaime in 1941, Gonzalo was regarded as second in the legitimist line of succession to the French throne for many years until the birth of his nephews in 1972 and 1974 respectively.

[15] He was given the Grand Cross of the Order of Saints Maurice and Lazarus by Prince Vittorio Emanuele of Savoy; the document of investiture referred to him as "Duke of Aquitaine".