King Juan Carlos - Biography of a King

His Majesty the King was born on January 5, 1938 to Juan de Borbon y Battenberg (father) and Maria de las Mercedes de Borbon y Orleans (mother). His father was the Count of Barcelona and Head of the Spanish Royal Household from the moment his grandfather, King Alfonso XIII decided to step down.

His birth took place in Rome, where the Royal Family was living, having had to leave Spain when the Republic was proclaimed in 1931. He was baptized Juan Carlos Alfonso Víctor María de Borbón y Borbón-Dos Sicilias.

For greater details you'll want to read the biography of King Juan Carlos.