Infante Francisco de Paula of Spain (10 March 1794 – 13 August 1865) was an Infante of Spain and the youngest son of Charles IV of Spain and Maria Luisa of Parma. He was a brother of Ferdinand VII, as well as the uncle and father-in-law of Isabella II. His education at the Spanish court was derailed by the Napoleonic intervention in Spain.
Infante Jaime of Spain, Duke of Segovia, Duke of Anjou (Jaime Leopoldo Isabelino Enrique Alejandro Alberto Alfonso Víctor Acacio Pedro Pablo María de Borbón y Battenberg) (23 June 1908 – 20 March 1975), was the second son of King Alfonso XIII of Spain and his wife Princess Victoria Eugenie of Battenberg.
Early life. Alfonso was born in Madrid, Spain, the elder son of Infante Antonio, Duke of Galliera and his wife, Infanta Eulalia of Spain. On his paternal side he was a grandson of Antoine, Duke of Montpensier, while on his maternal side he was a grandson of Queen Isabella II of Spain.
Infante Louis age 10 (1717) At birth he was the heir apparent but was not given the traditional title of " Prince of Asturias " until April 1709.  In 1714, when Louis was seven, his mother died, leaving him and his brothers, Infante Ferdinand and Infante Felipe Pedro.
The Dowager Duchess of Calabria is the widow of Infante Carlos, Duke of Calabria (16 January 1938 – 5 October 2015), who was the cousin and close friend of King Juan Carlos I. The Duchess of Calabria was born on 4 December 1938, and she is the daughter of Henri, Count of Paris , and Princess Isabelle of Orléans-Braganza . 
Infante Francisco de Asís, Duke of Cádiz: 10. Francis I of the Two Sicilies: 5. Princess Luisa Carlotta of the Two Sicilies: 11. Infanta Maria Isabella of Spain: 1. Alfonso XII of Spain: 12. Charles IV of Spain (= 8) 6. Ferdinand VII of Spain: 13. Princess Maria Luisa of Parma (= 9) 3. Isabella II of Spain: 14. Francis I of the Two Sicilies ...
Ferdinand was born in the Royal Alcázar of Madrid.He was the second son of Philip II of Spain.His mother was Philip II's niece and fourth wife, Anna of Austria.His elder half-brother, Don Carlos, had died in 1568, which meant that he was the new heir-apparent at birth and therefore Prince of Asturias.