King of Spain from 1975 to the present day, he was named by Francisco Franco as his successor.The only monarch to use the number one in his title. England's Queen Elizabeth only became Elizabeth I 350 years after she died, to distinguish her from Queen Elizabeth IIHas two daughters: Elena (b. December 1963) and Cristina (b. June 1965), and a son: Felipe (b. January 1968), who is the heir to the throne.Brother-in-law of King Constantine II .Is the only Spanish monarch to have visited all of Spain's former colonies in the Americas (Argentina, Bolivia, Chile, Colombia, Costa Rica, Cuba, Dominican Republic, Ecuador, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, Panama, Paraguay, Peru, Puerto Rico, Uruguay, and Venezuela. He also has visited the United States, where Spain had a huge portion of their empire located (mainly Florida, Texas, California, Utah, New Mexico, Arizona, Colorado, Montana, Oklahoma, and Nevada)Father-in-law of Iñaki Urdangarín and Princesa Letizia de Asturias .Father of Cristina de Borbón , Elena de Borbón , and Felipe de Borbón .Husband of Sofía de GreciaHas 8 grandchildren: Felipe Juan Froilán de Marichalar y Borbón (b. 1998), Victoria Federica de Marichalar y Borbón (b. 2000, Infanta Elena's son and daughter) Juan Urdangarín Borbón (b. 1999), Pablo Urdangarín Borbón (b. 2000), Miguel Urdangarín Borbón (b. 2002), Irene Urdangarín Borbón (b. 2005 (Infanta Cristina's three sons and daughter), Infanta Leonor Borbón Ortiz (b. 2005) and Infanta Sofia Borbón Ortiz (b. 2007, daughters of Felipe, Prince of Asturias).Son of Don Juan de Borbón (1913-1993) and Doña Mercedes (1910-2000).Brother of Infanta Pilar de Borbón (b.1936). She got married to the Duke of Badajoz (1934-1991). Together they had five children named Simoneta (b.1968), Juan Filiberto (b.1969), Bruno (b.1971), Beltrán (b.1973) and Fernando (b.1974).Brother of Infanta Margarita (b.1936). She got married to Don Carlos Zunita (b.1934). Together they had two children named Alfonso (b.1973) and María (b.1975).Brother of Infante Alfonso (1941-1956).Former father-in-law of Jaime de Marichalar .