Gaston IV (27 November 1422 – 25 or 28 July 1472) was the sovereign

Viscount of Béarn A viscount ( , for male) or viscountess (, for female) is a title used in certain European countries for a noble of varying status. In many countries a viscount, and its historical equivalents, was a non-hereditary, administrative or judicial ...

and the Count of Foix and Bigorre in France from 1436 to 1472. He also held the viscounties of

Marsan Marsan (; oc, Marçan, link=no, ) is a commune in the Gers department, southwestern France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and ...

, Castelbon,

Nébouzan Nébouzan (; Gascon: ''Nebosan'' ) was a small province of France located in the foothills of the Pyrenees mountains, in the southwest of France. It was not a contiguous province, but it was made up of several detached territories, approximately ...

, Villemeur and Lautrec and was, by virtue of the county of Foix, co-prince of Andorra. From 1447 he was also Viscount of Narbonne. Through his marriage to Eleonor, heiress of the Kingdom of Navarre, he also held the title of Prince of Navarre. He was a son of John I, Count of Foix and Jeanne d'Albret. His maternal grandparents were

Charles d'Albret Charles I d'Albret (December 1368 – 25 October 1415) was the Lord of Albret and the Constable of France from 1402 until 1411, and again from 1413 until 1415. He was also the co-commander of the French army at the Battle of Agincourt where he ...

Constable of France The Constable of France (french: Connétable de France, from Latin for 'count of the stables') was lieutenant to the King of France, the first of the original five Great Officers of the Crown (along with seneschal, chamberlain, butler, and ...

and co-commander of the French army, killed at the Battle of Agincourt, and his wife Marie de Sully. Gaston married the Navarrese ''Infanta'', Eleonor, in 1436. Her parents were

John II of Aragon John II ( Spanish: ''Juan II'', Catalan: ''Joan II'', Aragonese: ''Chuan II'' and eu, Joanes II; 29 June 1398 – 20 January 1479), called the Great (''el Gran'') or the Faithless (''el Sense Fe''), was King of Aragon from 1458 until his death ...

and Blanche I of Navarre. At the time, Leonor appeared to have few prospects: her father was a younger son and brother of kings of Aragon, and Leonor had a brother, Charles of Viana, and an older sister, Blanca, standing between herself and the throne of Navarre. However, family dissent and death eliminated both Charles and Blanca; Leonor's father usurped the Navarrese crown, to which he added in 1458 the throne of Aragon (his older brother having died without legitimate children) and, following the deaths of Charles and Blanca, promised the succession to Navarre to Leonor and her husband in return for their loyalty to him, which was given.

Children

* 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 Louis XII (27 June 14621 January 1515), was King of France from 1498 to 1515 and King of Naples from 1501 to 1504. The son of Charles, Duke of Orléans, and Maria of Cleves, he succeeded his 2nd cousin once removed and brother in law at the tim ...

. * Marguerite de Foix (1449–1486), married at Clisson on 27 June 1471

Francis II, Duke of Brittany Francis II ( Breton: ''Frañsez II'', French: ''François II'') (23 June 1433 – 9 September 1488) was Duke of Brittany from 1458 to his death. He was the grandson of John IV, Duke of Brittany. A recurring theme in Francis' life would be ...

. They were parents of Anne of Brittany, twice queen of France as consort to both Charles VIII and

. * Pierre de Foix (7 February 1449 – 10 August 1490), (sometimes called “Pierre II of Foix”), called Pierre the Young, cardinal (1576), viceroy of Navarre (1479–1484) * Marie de Foix (c. 1452–1467), married Guglielmo VIII, Marquis of Montferrat, son of Giangiacomo of Montferrat and his wife Jeanne de Savoie * Jeanne de Foix (c. 1454 – c. 1476), married in August 1469 in Lectoure, to Jean V of Armagnac (1420-1473). * Catherine de Foix (c. 1460 – before 1494), married in 1469

Gaston de Foix, Count of Candale Gaston de Foix (1448 – 25 March 1500), Earl of Kendal and Count of Benauges, was a French nobleman in the last decades of the Middle Ages. He was a cadet member of the important Foix family in Southern France. He was a son of John de Foix, 1st ...

(c. 1440–1500), (sometimes called “Gaston II of Foix”). * Isabel de Foix (after 1462). * Leonor de Foix (after 1466 – died young). * Jacques de Foix, Infante de Navarra (1469 – in France 1500), Count de Montfort. Married in 1485 and divorced in 1494 Ana de Peralta, daughter of Pedro de Peralta, 1st Count de Santisteban y Lerín and his second wife Isabelle de Grailly. Married secondly in 1495 Catherine de Beaumont, daughter of Louis de Beaumont, 2nd Count de Lerín and his wife Leonor de Aragón. Jacques and his second wife had one child: Jean de Foix, abbot of Saint-Volusien-de-Foix. Jacques also had two illegitimate children by unknown mistresses: Frederic de Foix (d. 1537), Seigneur d'Almenèches, and Jacques de Foix (d. 7 Apr 1535), Bishop of Oloron and Lescar.

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