Nemausus is often said to have been the Celtic patron god of Nemausus (Nīmes). The god does not seem to exist independently of the locality. The city certainly derived its name from Nemausus, which was perhaps the sacred wood in which the Celtic tribe of the Volcae Arecomici (who of their own accord surrendered to the Romans in 121 BC) held their assemblies (according to Encyclopaedia Britannica 1911), or was perhaps the local Celtic spirit guardian of the spring that originally provided all water for the settlement, as many modern sources suggest. Or perhaps Stephanus of Byzantium was correct in stating in his geographical dictionary that Nemausos, the city of Gaul, took its name from the Heracleid (or son of Heracles) Nemausios.
Nemausus was the Gallic god associated with the springs of Nimes.
According to the legend the City of Nemausus was founded around a well sacred to the divine Nemausus, a son of Heracles.This name was preserved through history and was later used by Roman colonists.
Nemausus especially grew under M. Vipsanius Agrippa, son in law to Augustus Caesar, and got the status of ĀColoniaĀ in the year 27 BCE, because veterans who had fought in the war against Antonius and Cleopatra in Egypt, settled here.