The etymology of the ethnonymElusates remains uncertain, but the root elus(a)- is generally presumed to be of Aquitanian origin. Alternatively, a connection with the Celtic root *elu(o)- ('numerous') has also been proposed.[2]
The city of Eauze, attested in the 4th century AD as civitas Elusa, is named after the tribe.[3]
The pre-Roman oppidum of Esbérous was located 3km northwest of Eauze.[5]
During the Roman period, their chief town was known as Elusa (modern Eauze). Made a Roman colonia in the early 3rd century AD, Elusa is documented as the capital of the province of Novempopulana by the Notitia Galliarum in the 4th century.[5][6] The settlement of Tasta, mentioned by Pliny, may be identified with the city since the field that partly covers the ancient Elusa is called La Taste.[5]
Cleary, Esmonde; Simon, A. (2004). "Éauze / Elusa (Gers)". Supplément à la Revue archéologique du centre de la France. 25 (1): 417–418. ISSN1951-6207.
Falileyev, Alexander (2010). Dictionary of Continental Celtic Place-names: A Celtic Companion to the Barrington Atlas of the Greek and Roman World. CMCS. ISBN978-0955718236.