 It now joins the Adriatic Sea near Casalborsetti, south-east of the Valli di Comacchio.The name of the river has the same etymology as the name of the Rhine, as both derive from the same Celtic hydronym
"*Rēnos", the Reno basin being situated within Gallia Cisalpina, in what was the territory of Boii before the Roman conquest of 220 BC.In Italian both rivers are called "Reno", and in Latin both were called "Rhenus".