The Basque language influence is clearly discernible in toponyms such as Ourse, Loures-Barousse, Izaourt, Sarp, Ourde, Esbareich, Sost, etc. Then the Romans left their marks with the names of estates such as Antichan and Samuran which eventually became villages.
The name of Ilheu is also reminiscent of the valley of Ilhéou.