Don Carlos María Alfonso Marcelo de Borbón-Dos Sicilias y Borbón-Parma, Infante of Spain, Duke of Calabria (16 January 1938 – 5 October 2015) was, at his death, the last male infante of Spain during the reigns of his cousins King Juan Carlos I and King Felipe VI.

The second of three children and the only son of Infante Alfonso de Borbón-Dos Sicilias y Borbón (1901–1964) and Princess Alicia of Bourbon-Parma (1917–2017), he was born during his parents' exile from republican Spain in Lausanne, Switzerland.

[6] The school was the site of a country house, Las Jarillas, located 10 miles north of Madrid and donated for the purpose by the Marquess of Urquijo.

[6] In November 1948 Carlos and Juan Carlos took up residence there, along with eight selected sons of the aristocracy (and one commoner, the future cabinet member José Luis Leal Maldonado) and a team of tutors selected by Don Juan, including as headmaster the liberal scholar José Garrido, along with a traditionalist chaplain, Ignacio de Zulueta.

[5] Although both were Roman Catholic Bourbons by male-line descent, a disagreement now erupted between the couple's fathers about the dynastic claim of Carlos's father to the legacy of the deposed House of Bourbon-Two Sicilies dynasty, whose last undisputed head, Ferdinand, Duke of Calabria, died without a son in January 1960.

[5] Anne's father Henri, Count of Paris, however, upheld the claim of Ferdinand's next younger brother, Prince Ranieri, Duke of Castro (1883–1973) to the headship of the house, contending that Carlo had renounced his and his future descendants' Sicilian rights when he married the Spanish heiress presumptive, Mercedes of Asturias, in 1901, no doubt being mindful that his own claim to be head of the royal House of France depended upon the validity of the 1713 renunciation of a senior Bourbon prince, Philip V of Spain, in favor of the junior House of Orléans.

[5] Carlos's father died in 1964, and with patience, persistence and compromise from afar, he eventually obtained the hand of his bride.

[5] Following marriage, Carlos and his wife remained for sometime guests of the Marquès de Decio, head of the household of Infante Alfonso in his capacity as Duke of Calabria.