Maria of Aragon, Queen of Castile
Maria of Aragon was the Queen consort of Castile and Leon as the wife of John II of Castile.
She was the daughter of Ferdinand I of Aragon and Eleanor of Alburquerque.
Eleanor of Castile (died 1244)
Eleanor of Castile( 1200 – 1244) was a daughter of Alfonso VIII of Castile and Eleanor of England.
She was Queen consort of Aragon by her arranged marriage to James I of Aragon.
Her mother was a daughter of Henry II of England and Eleanor of Aquitaine.
Eleanor's sister Berengaria became Queen of Castile since their brother Henry I of Castile died with no issue and because Berengaria was the eldest of the daughters.
Another sister, Blanche became Queen of France by her marriage to Louis VIII of France.
Sancha of Aragon, Countess of Toulouse
Sancha of Aragon( 1186–1241) was the daughter of King Alfonso II of Aragon and his wife, Sancha of Castile.
Through her marriage to Raymond VII, Count of Toulouse in 1211, she acquired the titles Countess of Toulouse and Marquise of Provence from then until their divorce in 1241.
Sancha's paternal grandparents were Ramon Berenguer IV, Count of Barcelona and Petronilla of Aragon; her maternal grandparents were Alfonso VII of León and Castile and Richeza of Poland, Queen of Castile.
She was the sister of Peter II of Aragon and Alfonso II, Count of Provence.
She had one child, Joan, Countess of Toulouse, who held the same titles as her mother from 1249 to 1271.
Constance of Aragon
Constance of Aragon( 1179 – 23 June 1222) was an Aragonese infanta who was by marriage firstly Queen of Hungary, and secondly Queen of Germany and Sicily and Holy Roman Empress.
She was regent of Sicily from 1212 – 1220.
She was the second child and eldest daughter of the nine children of Alfonso II of Aragon and Sancha of Castile.
Alfonso VII of León and Castile
Alfonso VII (1 March 110521 August 1157), called the Emperor ("el Emperador"), became the King of Galicia in 1111 and King of León and Castile in 1126.
Alfonso, born Alfonso Raimúndez, first used the title Emperor of All Spain, alongside his mother Urraca, once she vested him with the direct rule of Toledo in 1116.
Alfonso later held another investiture in 1135 in a grand ceremony reasserting his claims to the imperial title.
He was the son of Urraca of León and Raymond of Burgundy, the first of the House of Ivrea to rule in the Iberian peninsula.
Alfonso was a dignified and somewhat enigmatic figure.
His rule was characterised by the renewed supremacy of the western kingdoms of Christian Iberia over the eastern (Navarre and Aragón) after the reign of Alfonso the Battler.
Though he sought to make the imperial title meaningful in practice to both Christian and Muslim populations, his hegemonic intentions never saw fruition.
During his tenure, Portugal became "de facto" independent, in 1128, and was recognized as "de jure" independent, in 1143.
He was a patron of poets, including, probably, the troubadour Marcabru.
Eleanor of Aragon, Countess of Toulouse
Eleanor of Aragon, Countess of Tolouse( 1182–1226) was a daughter of King Alfonso II of Aragon and Sancha of Castile, Queen of Aragon.
She married Raymond VI, Count of Toulouse.
Eleanor of Aragon, Queen of Castile
Eleanor of Aragon (20 February 1358 – 13 August 1382) was a daughter of King Peter IV of Aragon and his wife Eleanor of Sicily.
She was a member of the House of Aragon and Queen of Castile by her marriage.
Hubba bint Hulail
Hubba bint Hulail was the grandmother of Hashim ibn' Abd Manaf, thus the great- great- great- grandmother of the Islamic" Nabī"( Prophet) Muhammad ibn Abdullah.
Sancha of Castile, Queen of Aragon
Sancha of Castile (21 September 1154/5 – 9 November 1208) was the only surviving child of King Alfonso VII of Castile by his second wife, Richeza of Poland.
On January 18, 1174, she married King Alfonso II of Aragon at Zaragoza; they had at least eight children who survived into adulthood.
A patroness of troubadours such as Giraud de Calanson and Peire Raymond, the queen became involved in a legal dispute with her husband concerning properties which formed part of her dower estates.
In 1177 she entered the county of Ribagorza and took forcible possession of various castles and fortresses which had belonged to the crown there.
After her husband died at Perpignan in 1196, Sancha was relegated to the background of political affairs by her son Peter II.
She retired from court, withdrawing to the Hospitaller convent for noble ladies, the Monastery of Santa María de Sigena, at Sigena, which she had founded.
There she assumed the cross of the Order of St John of Jerusalem which she wore until the end of her life.
The queen mother entertained her widowed daughter Constance at Sigena prior to her leaving Aragon to marry Emperor Frederick II in 1208.
She died soon afterwards, aged fifty-four, and was interred in front of the high altar of her foundation at the Monastery of Santa María de Sigena; her tomb is still there to be seen.
Sancha of León
Sancha of León( 8 November 1067) was a Queen of León.

Question: Who is Sancha Of Castile, Queen Of Aragon's paternal grandmother?
Answer: Urraca of León