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.[1]
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,[2] 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.
Ancestors
    
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References
    
- Lopes 1988, p. xxxviii.
 - de Pina Baleiras 2020, p. 46.
 - de Sousa, Antonio Caetano (1735). Historia genealogica da casa real portugueza. Lisboa Occidental. p. 415.
 
Sources
    
- Lopes, Fernão (1988). The English in Portugal, 1367-87: Extracts from the Chronicles of Dom Fernando and Dom Joao. Translated by Lomax, Derek W.; Oakley, R.J. Aris & Phillips Ltd.
 - de Pina Baleiras, Isabel (2020). "Portugal, 1385: a people's choice or coup d'etat?". In Rodrigues, Ana Maria S. A.; Silva, Manuela Santos; Spangler, Jonathan (eds.). Dynastic change : legitimacy and gender in medieval and early modern monarchy. Routledge.
 - Francisco de Moxó y de Montoliu, Estudios sobre las relaciones entre Aragón y Castilla, 1997, ISBN 84-7820-387-7
 
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