Philip of Castile, Lord of Cabrera and Ribera
Philip of Castile (Seville, 28 May 1292 – Madrid, April 1327), was an "infante of Castile", son of Sancho IV of Castile and María de Molina.
He was Lord of Cabrera and Ribera and regent of his nephew Alfonso XI of Castile.
He married his cousin Margarita de la Cerda, daughter of Alfonso de la Cerda.
Sancho IV of Castile
Sancho IV of Castile (12 May 1258 – 25 April 1295) called the Brave ("el Bravo"), was the King of Castile, León and Galicia from 1284 to his death.
He was the second son of Alfonso X and Yolanda, daughter of James I of Aragon.
Eleanor of Portugal, Queen of Aragon
Eleanor of Portugal( 1328- 30 October 1348), was a Portuguese" infanta" and queen consort of Aragon from 1347 to 1348.
The youngest daughter of King Afonso IV of Portugal and Beatrice of Castile, Leonor was the granddaughter of King Denis and Elizabeth of Aragon and of Sancho IV of Castile and Maria de Molina and sister of King Peter I of Portugal.
Ruy Pérez Ponce de León
Ruy Pérez
Ponce de León or Rodrigo Pérez
Ponce de León( b.?- d. 1295) was a Spanish noble of the House of Ponce de León, in the service of the Kingdom of Castile.
He was the 15th Grand Master of the Order of Calatrava from 1284 to 1295 under King Sancho IV of Castile and further served as Mayordomo Mayor del Rey from 1293- 1295, also under Sancho IV.
Beatrice of Castile (1293–1359)
Beatrice of Castile or Beatriz( 8 March 129325 October 1359), was an infanta of Castile, daughter of Sancho IV and María de Molina.
She was Queen of Portugal from the accession of her husband, Afonso IV, until his death on 28 May 1357.
Blanche of Castile (1319–75)
Blanche of Castile( August 1319 – 1375) was by birth a member of the Castilian House of Burgundy.
She was the only child of Infante Peter of Castile, Lord of Los Cameros( son of King Sancho IV of Castile) and Infanta Maria of Aragon( daughter of King James II of Aragon).
María de Molina
María Alfonso Téllez de Meneses( c. 1265 – 1321), known as María de Molina, was queen consort of Castile and León from 1284 to 1295 by marriage to Sancho IV of Castile, and served as regent for her minor son Ferdinand IV( 1295- c.1301) and later her grandson Alfonso XI of Castile( 1312- 1321).
Alfonso de la Cerda
Alfonso de la Cerda, (Valladolid 1270 - Ávila 1333), called the disinherited, was the elder son of Ferdinand de la Cerda and his wife Blanche of France, and was a grandson of Alfonso X of Castile.
Alfonso and his brother Fernando were candidates for the Castilian-Leonese crown during the reigns of Sancho IV of Castile, Ferdinand IV of Castile and Alfonso XI of Castile.
In 1331, Alfonso renounced his rights and swore allegiance to Alfonso XI of Castile.
Alfonso X of Castile
Alfonso X of Castile (also occasionally known as Alfonso X, Alphonso, Alphonse, or Alfons, The Wise ; 23 November 1221 in Toledo4 April 1284 in Seville) was a Spaniard, who was the King of Castile, León and Galicia from 30 May 1252 until his death in 1284.
During the election of 1257, a dissident faction chose him to be Roman-German king on 1 April.
He renounced his claim to Germany in 1275, and in creating an alliance with England in 1254, his claim on Gascony as well.
Alfonso X fostered the development of a cosmopolitan court that encouraged learning.
Jews, Muslims, and Christians had prominent roles in his court.
As a result of his encouraging the translation of works from Arabic and Latin into the vernacular of Castile, many intellectual changes took place, perhaps the most notable being encouragement of the use of Castilian as a primary language of higher learning, science, and law.
Alfonso was a prolific author of Galician poetry, such as the "Cantigas de Santa Maria", which are equally notable for their musical notation as for their literary merit.
Alfonso's scientific interests—he is sometimes nicknamed the Astrologer ("el Astrólogo")—led him to sponsor the creation of the Alfonsine tables, and the Alphonsus crater on the moon is named after him.
As a legislator he introduced the first vernacular law code in Spain, the "Siete Partidas".
He created the Mesta, an association of sheep farmers in the central plain, but debased the coinage to finance his claim to the German crown.
He fought a successful war with Portugal, but a less successful one with Granada.
The end of his reign was marred by a civil war with his eldest surviving son, the future Sancho IV, which continued after his death.
Maria of Aragon, Lady of Cameros
Maria of Aragon( c. 1299–1347 in Sijena) was a daughter of James II of Aragon and his second wife Blanche of Anjou.
She married Peter of Castile, Lord of Cameros( 1290 – 1319), son of Sancho IV of Castile.
Their daughter, Blanche of Castile( 1315 – 1375), was betrothed to Peter I of Portugal but the marriage never took place.
Maria died at Sijena in 1347.

Question: Where did Sancho Iv Of Castile's father die?
Answer: Seville