Gaston IV, Count of Foix

He also held the viscounties of Marsan, Castelbon, Nébouzan, Villemeur and Lautrec and was, by virtue of the county of Foix, co-prince of Andorra.His maternal grandparents were Charles d'Albret, Constable of France and co-commander of the French army, killed at the Battle of Agincourt, and his wife Marie de Sully.At the time, Eleanor appeared to have few prospects: her father was a younger son and brother of kings of Aragon, and she had two older siblings, Charles and Blanche, standing between herself and the throne of Navarre.However, family dissent and death eliminated both her siblings; Eleanor's father usurped the Navarrese crown, to which he added in 1458 the throne of Aragon (his older brother having died without legitimate children).Following the deaths of Charles and Blanche, King John promised the succession to Navarre to Eleanor and Gaston in return for their loyalty to him, which was given.
Seal of Gaston IV, Count of Foix
Count of FoixRoncesvallesEleanor of NavarreGaston, Prince of VianaPeter, Bishop of VannesJohn, Viscount of NarbonneMargaret, Duchess of BrittanyCatherine, Countess of CandaleJacques, Count of MontfortJohn I, Count of FoixViscount of BéarnBigorreMarsanNébouzanLautrecco-prince of AndorraViscount of NarbonneEleanorKingdom of NavarreCharles d'AlbretConstable of FranceBattle of AgincourtJohn IIBlanche I of NavarreCharlesBlancheFrancis PhoebusKing of NavarreGaston de FoixMagdalena of ValoisCatherineJean de FoixMarie of OrleansLouis XIIMarguerite de FoixFrancis II, Duke of BrittanyAnne of BrittanyCharles VIIIPierre de FoixGuglielmo VIII, Marquis of MontferratGiangiacomo of MontferratJean V of ArmagnacCatherine de FoixGaston de Foix, Count of CandaleJacques de Foix, Infante de NavarraSaint-Volusien-de-FoixArchambaud, Viscount of CastillonIsabella, Countess of FoixArnaud Amanieu, Lord of AlbretCharles I, Lord of AlbretMargaret of BourbonHouse of FoixJohn I