Gaston III Phoebus of Foix

Gaston Phoebus (30 April 1331 – 1 August 1391) was count of Foix and viscount of Béarn. He succeeded his father Gaston II in 1343 and began his personal rule in 1345. He claimed sovereignty over Béarn in 1347 and, playing England and France off against each other, made himself master of the Pyrenean foothills, crushing the House of Armagnac at Launac in 1362 though outnumbered.

His only legitimate son died in 1380 after a poison plot against him. He dictated the hunting treatise Livre de chasse and died in 1391.