1. JEAN de Foix (1382-Mazères, Ariège 4 May 1436). The 15th century Chronicle of Esquerrier names "Mossen Johan…Mossen Gaston…captal de Buc, Mossen Archimbaud…seignor de Navalhas, Mossen Mathieu…comte de Comenge, Fray Pey de l´ordre desl Frays Menors…cardinal" as the five sons of "Mossen Archimbaud de Grailli, captal de Buc et de Puch Pauli" and his wife[1023]. The dowager Queen Violant of Aragon, widow of King Juan I, wrote to Jean de Foix on 20 Jan 1411 promising the return of Castellví de Rosanes and Martorell (part of the properties confiscated from his maternal uncle Matthieu Comte de Foix) if her children succeeded to the throne[1024]. His parents confirmed the title Vescomte de Castellbò, which they had conferred on Jean earlier, in their joint testament dated 1402 "... facimus ordinamus et instituimus carissimum et predilectum Johannem filium nostrum primogenitum legitimum et naturalem iam ex alia nostra disposicione vicecomitem Castriboni extra pupillarem etatem existantem ... prout in precedentibus fecimus. A formal donation was made on 22 Mar 1406 with letters to the bailiff of Vich and Jean took possession 24 Apr 1406[1025]. He succeeded his mother through an agreement of 22 Feb 1412 as Comte de Foix, Vicomte souverain de Béarn, Vescomte de Castellbò, Villemur et Lautrec Vicomte de Marsan, Gabardan, Nébouzan, Vicomte souverain de Béarn, although the Etats de Béarn strongly objected to this familial arrangement and steadily refused to hear Jean de Foix's oath until Isabelle's death in 1428.. He became Comte de Bigorre in 1415 by agreement with Bernard VII Comte d'Armagnac, a title finally recognised by the King of France by letters patent of 18 Nov 1425, which definitively stabilized Jean de Foix's hitherto changing allegiances. The King of France installed him as Governor of Dauphiné in 1416. In 1425 he was appointed Governor of Languedoc (lieutenant du roi en Languedoc) and received from the King the vicomté de Lautrec[1026]. He also bought the vicomté de Villemur. Jean recovered the remaining part of the family's Spanish properties on his third marriage[1027]. He made a testament and a codicil dated 9 Oct 1429[1028], mostly with private provisions. The 15th century Chronicle of Esquerrier records the death "à Mazeras" in May 1436 of "Mossen Johan"[1029]. m firstly (Olite 12 Nov 1402) Infanta doña JUANA de Navarra, daughter of don CARLOS III "el Noble" King of Navarre & his wife Infanta doña Leonor de Castilla (1382-Béarn Jul 1413). She was recognised as heir to the throne of Navarre at Olite 3 Dec 1402. m secondly (betrothed [12 Jun 1411], 23 May 1422) JEANNE d'Albret, daughter of CHARLES [I] d'Albret Sire d'Albret [Constable of France] & his wife Marie Dame de Sully et de Craon (1403-1433). A contract dated 12 Jun 1411 records a payment made by "Archambaut comte de Foix" to "sire d´Albret Charles" for the marriage of "madame de Grelly fille dudict d´Albret"[1030]. This document is presumably misdated, assuming that the date of death of Jean´s first wife is correctly stated above. The 15th century Chronicle of Esquerrier records the second marriage 23 May 1422 of "Mossen Johan" and "Madona Johana de Labrit"[1031]. m thirdly (May 1436) as her first husband, doña JUANA de Urgel, daughter of don JAIME de Urgel [Aragón] Conde de Urgel & his wife Infanta doña Isabel de Aragón (Sijena 1415-1446 or after). The 15th century Chronicle of Esquerrier records the third marriage in May 1436 of "Mossen Johan" and "Madona Johana de Arago filha del comte de Urgel"[1032]. She married secondly don Juan Ramón Folch [III] de Cardona 5th Conde de Cardona, Duque de Cardona 1482. Comte Jean & his second wife had two children...
Count Jean had four illegitimate children by unknown mistresses.