. "Gaston IV, Count of Foix, Viscount of B\u00E9arn (27 November 1422 \u2013 25 July/28 July 1472) was a French nobleman from Bearn, who founded an ephemeral ruling dynasty within the Kingdom of Navarre.He was a son of John I, Count of Foix and Jeanne d'Albret. 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.Gaston married the Navarrese Infanta, Leonor, in 1436."@en . . . "Gaston IV, Count of Foix"@en . . "1422-11-27Z"^^ . . "1472-07-25Z"^^ .