 "For" is a Gascon word derived from the Latin "forum", specifically from the "Forum Iudicium", which was the law of the Visigoths.The first of the "fors" was a charter promulgated around 1080 by Centule V for the repopulation of the ancient town of Iluro (Oloron).This was the seed of the future For de Oloron, which granted the city a commune.