Alfonso V of León

Alfonso V (c. 994 – 7 August 1028), called the Noble, was King of León from 999 to 1028. Like other kings of León, he used the title emperor (Imperator totius Hispaniae) to assert his standing among the Christian rulers of Spain. He succeeded his father, Bermudo II, in 999. His mother Elvira García and count Menendo González, who raised him in Galicia, acted as his co-regents. Upon the count's death in 1008, Alfonso ruled on his own.

Source: Wikipedia — https://en.wikipedia.org/wiki/Alfonso_V_of_Le%C3%B3n