hello
i'm finding Arausio etymology
Arausio = Orange Town near from rhone river
see old irish ara/arae = temple = geographic particularity ?
are-ausi = arausio = front of ear
but too aus- = IE = draw water
see here
http://www.utexas.edu/cola/centers/lrc/ielex/X/P0148.html
ar-(e)- aus- = in front of/before/againts...the water
may be too
Oraison (Alpes Hte Provence) Auraisonio 1126... Durance river