They are only mentioned once as Avanticos (var. acanticos, aganticos) by Pliny (1st c. AD).[1][2]
The ethnonymAvantici is a latinized form of the Gaulish *Auanticoi (sing. Auanticos), deriving from the stem auant- ('source') attached to the adjectival suffix -ico-.[3][4] The stem does not appear to be Celtic. As the hydronymic lexicon is particularly resistant to name changes, auant- is probably a term of pre-Celtic Indo-European origin (cf. Latv. avuots 'source', Skr. avatá- 'well, cistern'), which eventually came to be adopted by the Celts; it may have made use of it in proper names only.[5]
Pliny (1938). Natural History. Loeb Classical Library. Translated by Rackham, H. Harvard University Press. ISBN978-0674993648. {{cite book}}: ISBN / Date incompatibility (help)
Bibliography
Barruol, Guy (1969). Les Peuples préromains du Sud-Est de la Gaule: étude de géographie historique. E. de Boccard. OCLC3279201.
de Hoz, Javier (2005). "Ptolemy and the linguistic history of the Narbonensis". In de Hoz, Javier; Luján, Eugenio R.; Sims-Williams, Patrick (eds.). New approaches to Celtic place-names in Ptolemy's Geography. Ediciones Clásicas. pp.173–188. ISBN978-8478825721.
Delamarre, Xavier (2003). Dictionnaire de la langue gauloise: Une approche linguistique du vieux-celtique continental. Errance. ISBN9782877723695.
Delamarre, Xavier (2019). Dictionnaire des thèmes nominaux du gaulois. Ab-/Iχs(o)-. Vol.1. Les Cents Chemins. ISBN978-1-7980-5040-8.
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.