Ceutrones
The Ceutrones (or Centrones) were a Gallic tribe dwelling in the Tarantaise Valley, in modern Savoie, during the Iron Age and Roman period.
[9][7] Their territory was located north of the Graioceli and Medulli, southeast of the Allobroges, southwest of the Veragri, and west of the Salassi, on the other side of the Alps.
In what appears to be a concerted attack, they attempted to prevent his passage through the upper Durance along with the Caturiges and Graioceli in 58 BC.
In that region the Ceutrones, the Graioceli, and the Caturiges, seizing points on the higher ground, essayed to stop the march of his army.
They were repulsed in several actions; and on the seventh day he moved from Ocelum, the last station of Hither Gaul, into the borders of the Vocontii in Further Gaul.The Ceutrones were possibly of Celto-Ligurian origin.
Note: Lake Geneva is shown at the top