Kurš datēja Alfonso XI of Castile?

Alfonso XI (11 August 1311 – 26 March 1350), called the Avenger (el Justiciero), was King of Castile and León. He was the son of Ferdinand IV of Castile and his wife Constance of Portugal. Upon his father's death in 1312, several disputes ensued over who would hold regency, which were resolved in 1313.

Once Alfonso was declared an adult in 1325, he began a reign that would serve to strengthen royal power and became known for his victory in the Battle of Rio Salado. While leading a siege against Yusuf I of Granada, he died of the plague in Gibraltar.

Leonor (Eleanor) de Guzmán y Ponce de León (1310–1351) was a Castilian noblewoman. After about 1330, she became the long-term mistress and favourite of Alfonso XI, with whom she had the illegitimate son Henry "the Fratricidal", future first monarch of the House of Trastámara. She held the lordship of Medina-Sidonia until she fell from grace in the wake of Alfonso's death in 1350. She was then executed by her enemies.