Sancho Alfonso, 1st Count of Alburquerque
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Sancho Alfonso, 1st Count of Alburquerque
Sancho Alfonso
1st Count of Alburquerque
Sepulcro del conde Sancho de Castilla (Catedral de Burgos).jpg
Sancho's tomb in the Cathedral of Burgos
Died19 March 1374 (aged 31–32)
SpouseBeatrice of Portugal
IssueFernando Sánchez of Alburquerque
Eleanor, Queen of Aragon
(illeg.) Leonor Sánchez
HouseCastilian House of Ivrea
FatherAlfonso XI of Castile
MotherEleanor of Guzman

Sancho Alfonso de Castilla (1342-1374) is known in Spanish as Don Sancho Alfonso de Castilla, Infante de Castilla, I conde de Alburquerque.

He was the ninth of the ten illegitimate children of King Alfonso XI of Castile and Lady Eleanor de Guzmán.

He was born in Seville. He participated in a revolt of the Castilian nobles against the despotic rule of his brother, Pedro of Castile.

In 1373 he 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 married Fadrique de Castilla y Ponce de Leon, illegitimate son of Henry II, King of Castile.



  1. ^ de Sousa, Antonio Caetano (1735). Historia genealogica da casa real portugueza. Lisboa Occidental. p. 415.
  • Francisco de Moxó y de Montoliu, Estudios sobre las relaciones entre Aragón y Castilla, 1997, ISBN 84-7820-387-7

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