You can helpexpand this article with text translated fromthe corresponding article in Spanish. (July 2012)Click [show] for important translation instructions. View a machine-translated version of the Spanish article. Machine translation, likeDeepL orGoogle Translate, is a useful starting point for translations, but translators must revise errors as necessary and confirm that the translation is accurate, rather than simply copy-pasting machine-translated text into the English Wikipedia. Do not translate text that appears unreliable or low-quality. If possible, verify the text with references provided in the foreign-language article. Youmust providecopyright attribution in theedit summary accompanying your translation by providing aninterlanguage link to the source of your translation. A model attribution edit summary isContent in this edit is translated from the existing Spanish Wikipedia article at [[:es:Sancho de Castilla (Conde de Alburquerque)]]; see its history for attribution. You may also add the template{{Translated|es|Sancho de Castilla (Conde de Alburquerque)}} to thetalk page. For more guidance, seeWikipedia:Translation.

Sancho Alfonso
1st Count of Alburquerque
Sancho's tomb in theCathedral of Burgos
Born	1342 Sevilla
Died	19 February 1374 (aged 31–32) Burgos
Spouse	Beatrice of Portugal
Issue	Eleanor, Queen of Aragon (illeg.) Leonor Sánchez
House	Castilian House of Ivrea
Father	Alfonso XI of Castile
Mother	Leonor de Guzmán

Sancho Alfonso of Castile (1342–1374), known inSpanish asDon Sancho Alfonso de Castilla, was Infante of Castile, 1st Count ofAlburquerque.

He was born inSeville as the ninth of the ten illegitimate children ofAlfonso XI of Castile andLeonor de Guzmán.^[1]

He participated in a revolt of the Castilian nobles against thedespotic rule of his brother,Peter of Castile.Together with his brothers Henry (future Henry II of Castile),Fadrique andTello, Sancho fought against his half-brother Peter.

In April 1366, his brotherHenry named him Count of Alburquerque, lord of Ledesma, Alba de Liste, Medellín, Tiedra and Montalbán. These lands had been confiscated from the only son ofJoão Afonso de Albuquerque and 7th Lord of Alburquerque. In 1373, Sancho marriedBeatrice of Portugal,^[2] daughter ofPeter I of Portugal andInês de Castro. They had one daughter:^[3]Eleanor of Alburquerque, who marriedFerdinand I of Aragon.

He also had an illegitimate daughter,^[3] Leonor Sánchez de Castilla, who had a liaison with her first cousin Fadrique de Castilla, 1st Duke of Benavente, illegitimate son ofHenry II of Castile with mistress Beatriz Ponce de León.

• 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 orcoup 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

• 1342 births
• 1375 deaths
• People from Seville
• 14th-century Castilians
• Counts of Spain
• Spanish people of Portuguese descent
• Spanish people of Italian descent
• Castilian House of Burgundy
• Sons of kings

• CS1 Spanish-language sources (es)
• Biography articles needing translation from Spanish Wikipedia
• Articles with short description
• Short description is different from Wikidata