Title: Gaston, Prince of Viana
Content: Francis I of Navarre, 1467–1483, King of Navarre 1479–1483 ; Catherine I of Navarre, 1470–1517, Queen-regnant of Navarre 1483–1517 Gaston, Prince of Viana, also called Gaston de Foix (1445 – 23 November 1470), was the son of Gaston IV of Foix and Queen Eleanor of Navarre, and was the heir of both. As Crown Prince of Navarre, he was called Prince of Viana. He married Magdalena of Valois, a daughter of Charles VII of France and Marie of Anjou on 7 March 1461 at Lescar. They had two children:  Gaston died in 1470 from wounds received in a jousting tournament in Libourne, Aquitaine, before his accession to the throne of Navarre. Consequently, Francis I and Catherine I rose to the throne successively, but it was Gaston's wife Magdalena who actually pulled the strings of the crown all the way to Catherine's marriage to John III of Albret in 1494, and her death in 1495.
Title: Gaston IV, Count of Foix
Content: Gaston de Foix (1443–1470), (sometimes called “Gaston V of Foix”), Viscount of Castelbon, Prince of Viana (1462–1470), lieutenant general of Navarre (1469). ; Jean de Foix (1446–1500), Viscount of Narbonne (1468–1500), Count d'Étampes (1478–1500). He claimed the throne of Navarre upon the death of his nephew François Phébus. He married in 1476 Marie of Orleans (1457–1493), sister of the future King of France Louis XII. ; Marguerite de Foix (1449–1486), married at Clisson on 27 June 1471 Francis II, Duke of Brittany. They were parents of Anne of Brittany, twice queen of France as consort to both Charles VIII and Louis XII. ; Pierre de Foix (7 February 1449 – 10 August 1490), (sometimes 
Title: County of Foix
Content:  renounced his claim. He left a son, Gaston de Foix (1489–1512), a distinguished French general, and a daughter, Germaine de Foix, who became the second wife of Ferdinand II of Aragon. In 1507, Gaston exchanged his viscounty of Narbonne with King Louis XII of France for the duchy of Nemours, and as duke of Nemours he took command of the French troops in Italy. After delivering Bologna and taking Brescia, Gaston encountered the troops of the Holy League at Ravenna in April 1512 and routed the enemy, but was killed during the pursuit. There were also younger branches of the house of Foix-Grailly: the viscounts of 
Title: Gaston
Content: Gaston I, Count of Foix (1287–1315) ; Gaston II, Count of Foix (1308–1343) ; Gaston III, Count of Foix (1331–1391) ; Gaston IV, Count of Foix (1422–1472) ; Gaston II, Viscount of Béarn (circa 951 – 1012) ; Gaston III, Viscount of Béarn (died on or before 1045) ; Gaston IV, Viscount of Béarn (died 1131) ; Gaston V, Viscount of Béarn (died 1170) ; Gaston VI, Viscount of Béarn (1173–1214) ; Gaston VII, Viscount of Béarn (1225–1290) ; Gaston of Foix, Prince of Viana (1444–1470) ; Gaston, Count of Marsan (1721–1743) ; Gaston, Duke of Orléans (1608–1660), French nobleman ; Gaston Bachelard (1884–1962), French philosopher ; Gaston Browne (born 1967), Antiguan politician and Prime Minister ; Gaston Caperton (born 1940), American politician ; Gaston d'Orléans (1842–1922), French prince and military commander ; Gaston de Foix, Count of Candale (1448–1500), French nobleman ; Gastón de 
Title: Gaston I, Count of Foix
Content: Gaston II de Foix, Count of Foix, Viscount of Béarn (1308 &ndash; 26 September 1343). ; Roger Bernard IV de Foix (1310 &ndash; after 24 March 1350), married Constanza de Luna (1310 &ndash; January 1353), daughter of Artal de Luna, by whom he had three children. ; Robert de Foix, Bishop of Lavaur ; Margaret of Foix ; Blanche de Foix, married in 1328 Jean de Grailly, Viscount of Castillon, Captal de Buch, by whom she had two children, including Jean III de Grailly, Captal de Buch. ; Joan of Foix (died 1358), married Infante Peter of Aragon, Count of Ribagorza y Ampurias, by whom she had three children, including Eleanor of Aragon, Queen of Cyprus. Gaston married in 1301 Joan of Artois (1289-1350), daughter of Philip of Artois and Blanche of Brittany. They had: 
Title: Gaston of Foix, Duke of Nemours
Content:  League in the War of the League of Cambrai. He met his end in said conflict, at the age of 21, during the Battle of Ravenna (1512), the last of his triumphs. Born in Mazères, County of Foix, he was the second child but only son of John of Foix, Viscount of Narbonne and Marie d'Orléans. His older sister was Germaine of Foix, Queen consort of Aragon as the second wife of Ferdinand II. His paternal grandparents were Gaston IV of Foix-Grailly and Queen regnant Eleanor of Navarre. His maternal grandparents were Charles, Duke of Orléans and Marie of Cleves. His only maternal uncle was Louis XII of France.
Title: Gaston II, Count of Foix
Content: Pedro de Bearn, married Florensa de Aragón, Lady of Biscay. ; Bearnesa, wife of Arnaldo Ramon de Castellnou, viscount of Orthez. ; Margarita, wife of Juan de Castellverdu, seigneur of Caumont ; Arnaldo Guillermo de Bearn (died 1391), married to Juana, Lady of Morlaàs. Gaston II of Foix-Béarn (1308 – September 1343), son of Gaston I of Foix-Béarn and Jeanne of Artois, was the 10th Count of Foix. In 1315, after the death of his father Gaston I, he became Count of Foix, and Viscount of Béarn, Marsan, Gabardan, Nébouzan and Lautrec under the regency of his mother, Jeanne of Artois. Count Gaston II imprisoned his mother Jeanne d'Artois in 1331 at the 
Title: County of Foix
Content:  his young son, Gaston III. Gaston III (1331–1391), called Phoebus, the Latin version of Apollo, on account of his beauty, was the most famous member of the House of Foix-Béarn. Like his father he assisted France in her struggle against England, being entrusted with the defence of the frontiers of Gascony. When the French king, John II, favored the count of Armagnac, Gaston left his service and went to fight against the pagans of Prussia. Returning to France around 1357, he delivered some noble ladies from the attacks of the adherents of the Jacquerie at Meaux, and was soon at war with the count of 
Title: Gaston I, Count of Foix
Content:   Gaston I of Foix or Gaston VIII of Foix-Béarn (1287 – Maubuisson, 13 December 1315) was the 9th Count of Foix, the 22nd Viscount of Béarn and Co-Prince of Andorra.
Title: Gaston I, Count of Foix
Content:  He was a son of Roger-Bernard III, Count of Foix and Margaret of Béarn, the eldest daughter and heiress of Gaston VII of Béarn. He succeeded his father in 1302 as Count Gaston I of Foix and Viscount Gaston VIII of Béarn, first under the regency of his mother. He was probably present at the Battle of the Golden Spurs in 1302, and fought again for the King of France against the Flemish at the Battle of Mons-en-Pévèle in 1304. When the cities of his County of Foix rebelled against the Royal tax collectors, because they raised the taxes to finance the expensive war against Flanders, Gaston supported his cities. For this, the County was confiscated for a while by the Senechal of Carcassonne. In 1308, he started a war against the Count of Armagnac, against the orders of the King, who had forbidden intra-French warfare. Gaston was 

Question: Who is the father of Gaston of Foix, Prince of Viana?
Answer: Gaston IV of Foix.
Gaston IV de Foix.