Juan de Castilla y Haro



Juan de Castilla y Haro, also known as Juan Yáñez de Castilla y Haro or Juan de Haro, el Tuerto (b. ? - d. 31 October 1326, Toro), was a Spanish noble of the House of Haro and of the royal line of the Kingdom of Castile descended from Alfonso X of Castile. He was the Lord of Cuéllar from 1319 to 1325 and the Lord of Biscay from 1322 until his assassination by order of King Alfonso XI of Castile in 1326.

Family Origins
He was the son and heir of María II Díaz de Haro, from whom he inherited the Lordship of Biscay, and her husband the infante John of Castile. His paternal grandfather was King Alfonso X of Castile and his maternal grandfather was Diego López III de Haro.

Marriage and Descendants
Juan married Isabel de Portugal y Manuel, the daughter of the infante Alfonso de Portugal son of King Afonso III of Portugal and his wife Violante Manuel, the daughter of infante Manuel de Castilla. This marriage produced the following children:


 * María Díaz II de Haro- would go on to inherit the Lordship of Biscay from Maria II Diaz de Haro. She married Juan Núñez III de Lara, the head of the House of Lara, son of the infante Ferdinand de la Cerda and great grandson of Alfonso X.