Alfonso XI, called the Avenger, was King of Castile and León. He was the son of Ferdinand IV of Castile and Constance of Portugal. Upon his father's death in 1312, several disputes ensued over who would hold regency, which were resolved in 1313.
- Occupation
- politician
- Position held
- Monarch of Castile and Leon
- Citizenship
- Crown of Castile
- Born
- August 13, 1311
- Died
- March 27, 1350, March 26, 1350
