| Fernando III Alfonsez "el Santo" of Castile-Léon K. of Castile, Léon, Galicia, etc. (1201 - 1252) |
Guillén Pérez de Guzmán Señor of Becilla |
| Isabel (or Beatriz) of Castile-Léon (1205 - 1235) |
| Alfonso X "el Sabio" of Castile-Léon King of Castile, Léon, etc. | Mayor Guillén de Guzman |
| b. 23 Nov 1221, Toledo, Spain d. 4 Apr 1284, Seville, Spain bur. Santa María Cathedral, Seville, Spain occ. cen. im. . ud. |
b. d. bef 1267, Alcoer bur. occ. cen. im. . ud. |
| Spouses: 1, 2, 3 |
| Beatris (or Beatriz) Alfonso of Castile-Léon |