ARCHAMBAUD de Grailly, son of PIERRE [II] de Grailly, Vicomte de Castillon[-la-Bataille], Captal de Buch, chevalier de la Jarretière & his second wife Erembourg de Périgord (-1413). Vicomte de Castillon and Baron de Gurçon, castle in Carsac-de-Gurçon {Dordogne}, subsequently, by succeeding his nephew Jean [III] de Grailly, Captal de Buch, Vicomte de Benauges {ruined castle in Arbis, Gironde}, Rolle and Lavaux {Vaud, Switzerland} et Longueville {-sur-Scie, Seine-Maritime}. Comte de Foix, de iure uxoris. A manuscript chronicle records that "D. Archambaldus de Graillaco, comes Fuxi et vice-comes Neboziani" swore allegiance for "suo vice-comitatu", with the consent of "Isabellæ uxoris suæ", to the French king in 1389[1018]. His joint testament with his wife is dated 1402[1019]: "Nos Archambaudus de Greilino Dei gracia comes Fuxi vicecomes Bearnii Marsani Gavardani capitalis de Bugio vicecomes Benaugiarum et Castellionis dominusque de Navalhiis et Ysabellis de Fuxo eadem gracia comitissa vicecomitissa capitalissa dominaque comitatus vicecomitatum et terrarum predictorum coniuges".
m (1381) ISABELLE de Foix, daughter of ROGER BERNARD [II] de Foix Vescomte de Castellbò & his wife Géraude [Geralda/Guiraude] Dame de Navailles et de Sault (before 2 Nov 1361-1428, bur Abbaye de Boulbonne (Cistercian), Mazères {Ariège}). The 15th century Chronicle of Esquerrier names "Madona Isabel molher de Mossen Archimbaud captal de Grailli, de Buc et de Puch Pauli" as sister of "Mossen Mathieu"[1020]. She succeeded her brother in 1398 as Ctss de Foix et de Bigorre, Vicomtesse de Béarn, Vescomtesa de Castellbò, Vicomtesse de Marsan, de Gavardan et de Lautrec, dame de Navailles et de Sault. Martín King of Aragon donated to Isabelle, comtesse de Foix, the vizcondad de Castellbò and other possessions of her late brother Mathieu Comte de Foix, with a few exceptions, by letters dated 20 Jul 1400[1021]. The principalilty of Béarn was defined as sobiraa (sovereign) under the treaty of Tarbes, Hautes-Pyrénées 10 May 1399 between the English and French chancelleries. In 1400, Isabelle recovered the major part of the family's Spanish properties confiscated from her brother Matthieu. She made a second testament 2 Jan 1427[1022] with mostly private provisions.
Archambaud & his wife had five children:
