The word "Aigoual" appears with different meanings: "ad stratam Aigoaldi" in 1228 refers to a route, "marcha Algoaldi" in 1238 names the limits of a territory, and "mons Aigoaldi" in 1249 is the name of the mountain. It seems that Aigoual comes from the word "Algwarld", the name of a person in the region.