Frederick of Castile, in Spanish Fadrique, was a younger son of King Ferdinand III of Castile by his first wife, Elisabeth of Hohenstaufen. He was born in Guadalajara. Wikipedia
Born: 1223, Guadalajara, Spain
Died: April 1277 (age 54 years), Castillo de Burgos, Burgos, Spain
Children: Beatriz Fadrique de Castilla
Great-grandparents: Alfonso VIII of Castile, Eleanor of England, Queen of Castile, Frederick Barbarossa, and more
Parents: Ferdinand III of León and Elisabeth of Swabia
Siblings: Alfonso X El Sabio
Partner: Caterina Angelina (?) (1274–)