Violant of Castile
Violant of Castile (1265–1287/1308), infanta of Castile and Lady of Biscay on her marriage to Diego López V de Haro.
She was the daughter of Alfonso X of Castile, and Violant of Aragon.
Ferdinand of Castile (born 1238)
Ferdinand of Castile( 1238- before 1264/ 1269), Infante of Castile, was the son of King Ferdinand III of Castile and Joan of Danmartin.
He was the Count of Aumale, Baron of Montgomery and of Noyelles- sur- Mer.
Peter of Castile, Lord of Ledesma
Peter of Castile( June 1260, in Seville – 10 October 1283, in Ledesma), was an infante of Castile.
He was a son of Alfonso X of Castile and Violant of Aragon who was also called Yolanda or Yolante.
He was Lord(" señor") of Ledesma, Alba de Tormes, Salvatierra, Miranda del Castañar, Galisteo and Granadilla.
James of Castile, Lord of Cameros
James of Castile( 11 July 1268 – 9 August 1284), was an infante of Castile and Lord of Cameros.
He was the youngest son of Alfonso X of Castile and Violant of Aragon.
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.
Eleanor of Castile, Queen of Navarre
Eleanor of Castile( after 1363 – 27 February 1416) was an infanta of Castile and the Queen consort of Navarre.
She was the daughter of King Henry II of Castile and his wife, Juana Manuel of Castile, from a cadet branch of the Castilian royal house.
Eleanor was a member of the House of Trastámara.
Berengaria of Castile, Lady of Guadalajara
Berengaria of Castile( Seville, 1253 – Guadalajara, 1300), an infanta of Castile, ruled as Lady of Guadalajara in her own right.
She was the eldest daughter of Alfonso X of Castile and Violant of Aragon.
She was the eldest daughter and heir of Alfonso X until the birth of her brother Ferdinand de la Cerda.
She was betrothed to Louis of France( 1244 – 1260), the son and heir of King Saint Louis IX of France, but her fiancé died prematurely in 1260.
She entered Abbey of Santa María la Real de Las Huelgas before 1284.
Beatrice of Castile, Marchioness of Montferrat
Beatrice of Castile (5 November or 6 December 1254 - 1286) was a daughter of Alfonso X of Castile and his wife Violant of Aragon.
She was Marchioness of Montferrat by her marriage and was mother of Irene of Montferrat.
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.
Urraca of Covarrubias
Urraca of Castile( died after January 1038) was co-regent of Castile during the minority of her nephew, García Sánchez of Castile, in 1017- 28.

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