Eleanor of Aragon, queen of Castile (born 1358)

Eleanor of Aragon was the daughter of King Peter IV of Aragon and Eleanor of Sicily. She was a member of the House of Barcelona and Queen of Castile by her marriage.

The Kingdom of Castile was a polity in the Iberian Peninsula during the Middle Ages. It traces its origins to the 9th-century County of Castile, as an eastern frontier lordship of the Kingdom of León. During the 10th century, the Castilian counts increased their autonomy, but it was not until 1065 that it was separated from the Kingdom of León and became a kingdom in its own right. Between 1072 and 1157, it was again united with León, and after 1230, the union became permanent.