Question: Who is Sancha Of Castile, Queen Of Navarre's paternal grandfather?

Knowledge 1: Sancha of Castile, Queen of Navarre
Sancha of Castile (–1179) was daughter of Alfonso VII of León and Castile and his first wife Berengaria of Barcelona.Sancha was the fifth child of seven born to her parents.On 20 July 1153, Sancha married Sancho VI of Navarre.He is responsible for bringing his kingdom into the political orbit of Europe.As "la reyna de Navarra, filla del emperador" (the queen of Navarre, daughter of the Emperor)her August 1179 death was reported in the "Annales Toledanos". [SEP] Knowledge 2: 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.
Knowledge 1: 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. [SEP] Knowledge 2: René I, Viscount of Rohan
René I de Rohan,( 1516–1552) 18th Viscount of Rohan, Viscount and Prince de Léon, and Marquis de Blain married Isabella of Navarre daughter of jure uxoris King John III of Navarre and Catherine of Navarre, Queen of Navarre.
Knowledge 1: Sancha of Castile, Queen of Navarre
Sancha of Castile (–1179) was daughter of Alfonso VII of León and Castile and his first wife Berengaria of Barcelona.Sancha was the fifth child of seven born to her parents.On 20 July 1153, Sancha married Sancho VI of Navarre.He is responsible for bringing his kingdom into the political orbit of Europe.As "la reyna de Navarra, filla del emperador" (the queen of Navarre, daughter of the Emperor)her August 1179 death was reported in the "Annales Toledanos". [SEP] Knowledge 2: Sancha of León
Sancha of León( 8 November 1067) was a Queen of León.

Answer: Raymond of Burgundy