Joan I, (Basque: Joana I.a Nafarroakoa) the daughter of King Henry I of Navarre and Blanche of Artois, reigned as queen regnant of Navarre and also served as queen consort to Philip IV of France.
Philip IV, called the Fair (French: Philippe le Bel, Basque: Filipe Ederra) or the Iron King (French: le Roi de fer), was King of France from 1285 until his death. By virtue of his marriage with Joan I of Navarre, he was also Philip I, King of Navarre from 1284 to 1305. He also briefly ruled the County of Champagne in right of his wife, although after his accession as king in 1285 the county remained under the sole governance of his wife until 1305, and then his son, Louis until 1314.
The English translation of the royal style of Philip IV was "By the Grace of God, King of France and Navarre, Count of Champagne" (1285 - 1305), then "By the Grace of God, King of France" (1305 - 1314).