 600 BC.The former "Hippo" or "Hippona" of the Carpetanians, where the Celtiberians defeated the Roman troops of Quintius and Calpurnius, derives its current from the times of the Muslim rule, when it was called "Hepes", which in turn would produce "Hiepes", "Iepes" and finally "Yepes".It is possible that "Hepes" be a mozarabic toponym.