maior, Duria Baltica or Duria Bautica. Strabo called it ??????? (Dourias) in Greek. The name comes from the Celtic root *dubr- ("flow"), itself from the Proto-Indo-European root *dhew- ("flow"). This root can be found in many European river names, such as Douro. The second element may derive from the Illyrian root *balta ("'swamp, marsh, white clay").

The river is called Duère Baltèa in