of Archambaud de Foix-Grailly, Baron de Navailles) and her husband Jean, Vicomte de Carmain, whose descendants adopted the name and arms of Foix. Houses of Albret and the House of Bourbon When Catherine, wife of Jean d'Albret, succeeded her brother Francis Phoebus, the House of Foix-Grailly was merged into that of Albret, and later into that of Bourbon with Henry III of Navarre, son of Antoine de Bourbon and Jeanne d'Albret. Henry III of Navarre became King Henry IV of France in 1589. In 1607, he united to the French crown his personal fiefs that were under French sovereignty (i.e. County of Foix, Bigorre, Quatre-Vallées, and Nébouzan, but not Béarn and Lower Navarre, which were sovereign countries outside of the kingdom of France), and so the county of Foix became part of the royal domain. See also Foix Castle of Foix Counts of Foix References Former counties of France Former provinces of France