Alfonso, Duke of Anjou and Cádiz

Since Alfonso's mother was not born a princess of royal descent, his grandfather Alfonso XIII did not consider young Alfonso in line to the Spanish throne in accordance with the Pragmatic Sanction of 1830. Alfonso's father Jaime, however, came to assert that his sons were French dynasts entitled to the style of Royal Highness.

Alfonso was born at Sant'Anna Clinic in Rome, the elder son of Infante Jaime, Duke of Segovia, King Alfonso's second of four sons. His mother was Donna Emanuela de Dampierre, daughter of Roger, Duke of San Lorenzo and Donna Vittoria Ruspoli dei principi di Poggio Suasa. The Segovias lived in Rome where Jaime's father had maintained a royal court-in-exile since the royal family fled Spain following the 1931 election of republicans and socialists in Spain's major cities. Alfonso was baptised by Cardinal Eugenio Pacelli (later Pope Pius XII) at the Palazzo Ruspoli on the Via del Corso in Rome, home of his maternal grandmother, Donna Vittoria Ruspoli dei principi di Poggio Suasa.

The king's eldest son, Alfonso, Prince of Asturias, had inherited hemophilia from his maternal great-grandmother Queen Victoria, yet had been considered Spain's heir apparent until the republic was established in 1931. In 1933 he renounced any claim to inherit the Spanish throne (in the event of a restoration) to marry a Cuban commoner, Edelmira Sampedro-Ocejo, and later died of internal bleeding following a minor auto accident by September 1938. Next in the line of succession, Infante Don Jaime, deaf and largely mute, was that same day persuaded to renounce his claim (and that of future descendants) alongside his elder brother, thereby assuming the Duke of Segovia title and clearing the way for King Alfonso's third son, Don Juan, Count of Barcelona to take up the monarchist cause on behalf of the banished dynasty. There being no need for Segovia to contract a dynastic alliance, Emanuela de Dampierre's noble rather than royal background was looked upon approvingly by the former king and former queen when the couple wed in Rome in 1935, and neither style nor title is attributed to Alfonso de Borbón-Segovia y Dampierre in the 1944 edition of the Almanach de Gotha.

Alfonso, Duke of Anjou, Duke of Cádiz, Grandee of Spain (Spanish: Don Alfonso Jaime Marcelino Manuel Víctor María de Borbón y Dampierre; French: Alphonse Jacques Marcellin Emmanuel Victor Marie de Bourbon; 20 April 1936 – 30 January 1989) was a grandson of Alfonso XIII, King of Spain, a potential heir to the throne in the event of the restoration of the Spanish monarchy as Alfonso XIV, and a Legitimist claimant to the defunct throne of France as Alphonse II.

During the Spanish civil war which began in July 1936 Franco emerged as the Caudillo of the Falangist movement, overturning the republic and promising restoration, yet consolidating his grip on power in Madrid. Following Alfonso XIII's death in Rome in February 1941, Franco wrote Don Juan, acknowledging him as rightful heir to the throne (though without inviting him to occupy it), implicitly confirming that he considered Segovia and his sons excluded from the royal succession. Although in 1947, following the overturn of monarchies in Eastern Europe and Italy, Franco promulgated, and voters approved, a succession law which defined Spain as a kingdom, it also empowered Franco to decide whom to enthrone and when. Don Juan responded by issuing the Estoril Manifesto which affirmed the traditional order of succession, and followed up with comments embracing a democratic monarchy. The new law allowed Franco or his successor to choose any man "of royal lineage" as king, and Alfonso was mentioned that year as a possible alternative to Don Juan and his son, Juan Carlos, should Franco consider the former too liberal to reign over a Falangist Spain.

From his birth, Alfonso was considered a prince du sang by those legitimists who believed that Alfonso XIII was also the heir to the French throne. When his grandfather died on 28 February 1941, Alfonso's father Jaime succeeded him in this French claim; Alfonso was thereupon recognised by the legitimists as Dauphin of France.

In 1941, Alfonso and his parents followed his English-born grandmother, Queen Victoria Eugenie to Lausanne in Switzerland. They lived first at the Hotel Royal, before Alfonso and his younger brother Gonzalo were sent to the Collège Saint-Jean (later Villa St. Jean International School) in Fribourg. On 8 December 1946 Alfonso made his first communion with his brother, Gonzalo; on the same day he was confirmed by Pedro Cardinal Segura y Sáenz, Archbishop of Seville.

On 25 November 1950, Alfonso received the title Duc de Bourbon (Duke of Bourbon) from his father. In 1963, Alfonso engaged the French historian and ardent royalist Hervé Pinoteau as his private secretary. Pinoteau remained with him until the duke's death.

In December 1949, Segovia retracted his renunciation as coerced and claimed that he was the rightful claimant to Spain's crown. Relations between Don Juan and Franco continued to deteriorate and in 1952 the latter prevailed upon Segovia to send his elder son to Spain to be educated under his guidance. Reluctantly, Alfonso moved from Switzerland to Spain, initially to study law at Deusto University and, in 1955 to attend the elite Centro de Estudios Universitarios (CEU). By 1956 Franco was diverting sponsors of some civic events from Juan Carlos, who was also being educated in Spain under the Caudillo's supervision, to Alfonso. By 1964, Franco considered Juan Carlos his preferred candidate for the throne over his father, but also considered that if the latter deviated from obedience to Franco or loyalty to his Movimiento Nacional, Alfonso was a suitable alternative. Alfonso's strongest supporter in Franco's government was Jose Solis, minister and secretary-general of the Movimiento. Anticipating that Franco would soon offer to declare him Spain's next king rather than Don Juan, in June 1969, Juan Carlos warned his father that if he declined Franco's offer, Alfonso would be invited to accept the crown, nevertheless Don Juan refused to consent to being bypassed. Nonetheless on 12 July 1969 Franco offered to designate Juan Carlos King whenever he stepped down from power, and Juan Carlos accepted.

Asked by Juan Carlos to be chief witness at the ceremony declaring him successor and Prince of Spain, Alfonso immediately agreed to do so and sent some of his supporters to visit his father in Paris to persuade him to express no opposition publicly. In return for his full support, Franco later appointed Alfonso Spain's ambassador to Sweden. But in June 1972, after he had taken up that post, Alfonso advised Franco's foreign minister Laureano López Rodó that he deemed his support conditional upon his cousin's continued loyalty to Francoist Spain. He further hinted that Spain's law of succession should be amended to facilitate Alfonso's replacing or succeeding Juan Carlos as Franco's heir or on the throne, if circumstances called for such a change.

On 8 March 1972, in the Palace of El Pardo in Madrid, Alfonso married Doña María del Carmen Martínez-Bordiú y Franco, daughter of Don Cristóbal Martínez-Bordiú, 10th Marquis de Villaverde, and of his wife, Doña Carmen Franco y Polo (Franco's only daughter. Doña Carmen was granted a title in 1975 becoming the 1st Duchess de Franco after Franco's death). The witnesses of the marriage were Franco and Alfonso's mother. Alfonso and Carmen separated in 1979, received a civil divorce in 1982 and an ecclesiastical annulment in 1986.

On 22 November 1972, General Franco awarded Alfonso the Spanish title Duque de Cádiz with the dignity Grandee of Spain, and he received the style of Royal Highness. The Cádiz title had been held by Alfonso's great-great-grandfather, the Infante Francisco de Asís.

In Spain up until 1972, Alfonso was generally addressed as Don Alfonso de Borbón y Dampierre. Elsewhere he was often addressed as a prince.

On 20 March 1975, Alfonso's father Jaime died; he was immediately recognised by his supporters as King Alphonse II of France. On 3 August 1975, he took the courtesy title Duc d'Anjou (Duke of Anjou).

From 1977 to 1984, Alfonso was President of the Spanish Skiing Federation, and from 1984 to 1987 President of the Spanish Olympic Committee.

On 21 January 1985 (the 192nd anniversary of the death of King Louis XVI) Alfonso was present for the requiem mass at the Chapelle expiatoire in Paris.

In 1987, Prince Henri of Orléans, Count of Clermont, eldest son of Henri, Count of Paris, the then Orléanist claimant to the defunct throne of France, initiated a court action against Alfonso for his use of the title Duke of Anjou and the coat-of-arms France Moderne (three fleur-de-lis or); Henri asked the court to fine Alfonso 50,000 French francs for each future violation. In 1988, Prince Ferdinand, Duke of Castro and Prince Sixtus Henry of Bourbon-Parma joined Henri's lawsuit in reference to the use of the title Duke of Anjou, but not in respect to the coat-of-arms. On 21 December 1988, the Tribunal de grande instance of Paris ruled that the lawsuit was inadmissible because the title's legal existence could not be proven; that neither the plaintiff (Henri) nor the intervenors (Fernando and Sixtus) had established their claims to the title; and that Henri was not injured from the use of the plain arms of France by the Spanish branch of the Bourbon family.

In 1989, Prince Henri d'Orléans and Prince Sixtus Henry of Bourbon-Parma appealed the judgment in the lawsuit about the use of a title and arms by Alfonso; the original judgment in favour of Alfonso was upheld.

Alfonso died in a skiing accident in Beaver Creek Resort, Eagle County, Colorado, on 30 January 1989, beheaded by a cable which he collided with as it was being raised to support a banner at the finish line of a course at the FIS Alpine World Ski Championships.