"Pedro Fernández de Castro (c. 1290 – Algeciras, 1342), nicknamed el de la Guerra ('of the War'), was a powerful Galician noble and military figure of the House of Castro, descended by illegitimate lines from the kings of Castile-Leon-Galicia. Pedro Fernandez de Castro was Lord (Señor) of Lemos and Sarria and served as mayordomo mayor (lord steward) of Alfonso XI of Castile, adelantado de la frontera (governor) of Andalusia, Galicia and Murcia and pertiguero mayor (a title similar to the French Vidame) of the lands of Santiago.
"He was the father of Fernando Ruiz de Castro (toda la lealtad de España), Queen Juana de Castro (wife of Peter of Castile), the controversial Inês de Castro (consort King Peter I of Portugal) and Álvaro Pires de Castro." 
"At his death, the body of Pedro Fernandez de Castro was taken to Galicia and buried in the Cathedral of Santiago de Compostela. His remains were buried in the choir of the Cathedral. During 19th century his tomb was examined and found next to his remains were some pieces of silk, a brooch and gold spurs, which are supposedly those of Sultan of Morocco Abu Al-Hasan Ali ibn Othman, of which Pedro Fernandez de Castro had seized during the Battle of Salado." 
His first wife was, Beatrice of Portugal, Lady of Lemos, youngest daughter of Afonso of Portugal, Lord of Portalegre and Violante Manuel, granddaughter of King Ferdinand III of Castile and León. There were no children from this marriage.
His second wife was, Isabel Ponce de Leon, daughter of Pedro Ponce de Leon, Lord of Cangas and Tineo, and his wife, Sancha Gil de Braganza. Their children were:
From his mistress, Aldonza Lorenzo de Valladares were born:
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