Sancho of Castile, Count of Alburquerque
Sancho Alfonso of Castile (1342–1374), known in Spanish as Don Sancho Alfonso de Castilla, was Infante of Castile, 1st Count of Alburquerque.
| Sancho Alfonso | |
|---|---|
| 1st Count of Alburquerque | |
Sancho's tomb in the Cathedral of Burgos | |
| Born | 1342 Sevilla |
| Died | 19 March 1374 (aged 31–32) Burgos |
| Spouse | Beatrice of Portugal |
| Issue | Fernando Sánchez, 2nd Count of Alburquerque Eleanor, Queen of Aragon (illeg.) Leonor Sánchez |
| House | Castilian House of Ivrea |
| Father | Alfonso XI of Castile |
| Mother | Leonor de Guzmán |
He was the ninth of the ten illegitimate children of Alfonso XI of Castile and Leonor de Guzmán.
He was born in Seville. He participated in a revolt of the Castilian nobles against the despotic rule of his brother, Peter of Castile.
In 1373, Sancho married Beatrice of Portugal, daughter of Peter I of Portugal and Inês de Castro. They had two children: Fernando Sánchez, 2nd Count of Alburquerque, and Eleanor of Alburquerque, who married Ferdinand I of Aragon.
He also had an illegitimate daughter, Leonor Sánchez de Castilla, who had a liaison with her first cousin Fadrique de Castilla, 1st Duke of Benavente, illegitimate son of Henry II of Castile with mistress Beatriz Ponce de León.