▁dated ▁to ▁c . ▁ 3 0 0 ▁BC . ▁The ▁ins cription ▁in ▁E tr us can ▁letters ▁reads ▁el uve itie , ▁which ▁has ▁been ▁interpreted ▁as ▁the ▁E tr us can ▁form ▁of ▁the ▁C elt ic ▁el u ̯ eti ̯ os ▁(" the ▁Hel vet ian "), ▁pres umably ▁referring ▁to ▁a ▁man ▁of ▁Hel vet ian ▁descent ▁living ▁in ▁Mant ua . ▁ ▁Trib al ▁organisation ▁ ▁Of ▁the ▁four ▁Hel vet ian ▁pag i ▁or ▁sub - t rib es , ▁Ca esar ▁names ▁only ▁the ▁Verb igen i ▁( B ell .   G all . ▁ 1 . 2 7 ) ▁and ▁the ▁Tig ur ini ▁( 1 . 1 2 ), ▁Pos id on ius ▁the ▁Tig ur ini ▁and ▁the ▁T oug eni ▁( ). ▁ ▁There ▁has ▁been ▁substantial ▁debate ▁in ▁Swiss ▁histor i ography ▁( begin ning ▁with ▁Felix ▁St ä hel in ▁ 1 9 2 7 ) ▁on ▁whether ▁the ▁T oug eni ▁may ▁or ▁may ▁not ▁be ▁identified ▁with ▁the ▁Te ut ones ▁mentioned ▁by ▁Tit us ▁Liv ius . ▁ ▁According ▁to ▁Ca esar , ▁the ▁territory ▁abandoned ▁by ▁the ▁Hel vet ii ▁had ▁compr ised ▁ 4 0 0 ▁villages ▁and ▁ 1 2 ▁opp ida ▁( fort ified ▁settlement s ). ▁His ▁t ally ▁of ▁the ▁total ▁population ▁taken ▁from ▁captured ▁Hel vet ian ▁records ▁written ▁in ▁Greek ▁is ▁ 2 6 3 , 0 0 0 ▁people , ▁including ▁fighting ▁men , ▁old