Auch is a commune in southwestern France. Located in the region of Midi Pyrénées, it is the capital of the Gers department. Auch is the historical capital of Gascony. Auch is a very ancient town. The name of Auch comes from the Aquitanian tribe that inhabited the area at the time of the Roman conquest in the 50s BC. The name of this tribe, as recorded by the Romans, was Ausci singular Auscus. Aquitanians spoke a language related to the old Basque language, and a striking fact is that the name Ausci seems related to the native name of the modern Basques, who call themselves Euskal.
At the time of the Roman conquest, the native name of Auch, as recorded by the Romans, was Elimberris. Elimberris is itself a variant of Iliberri, where Ili- comes from the Iberian word iltir' or iltur meaning town, city, oppidum, a frequent prefix in names of Iberian cities, and which was probably borrowed into Basque and also Aquitanian. In modern Basque there is also the word berri which means "new", so Iliberri is often interpreted as meaning "new oppidum".