In pre-Roman times the river's name was "Arar", a doubling of the Indo-European root ar (water). According to Julius Caesar's Commentaries on the Gallic War this doubling reflected the idea that it was difficult to identify the direction of the river due to its slow rate of flow. The Battle of the Arar was the first major battle of the Gallic Wars. Its current name came from a sacred spring, Sauc-Onna, located at Chalon, which was used by Roman legionaries to refer to the entire river.
In pre-Roman times the river's name was "Arar" a doubling of the Indo-European root ar (water) According to Julius Caesar's Commentaries on the Gallic War this doubling reflected the idea that it was difficult to identify the direction of the river due to its slow rate of flow The Battle of the Arar was the first major battle of the Gallic Wars Its current name came from a sacred spring Sauc-Onna located at Chalon which was used by Roman legionaries to refer to the entire river