Save Type River Usage English Meaning & History From Latin Danubius, from Indo-European Danu, probably meaning "river, water". This is the name of a river that flows east through Europe to the Black Sea. Related NamesFamily Tree·Details Other Languages & CulturesDanubius(Ancient Roman) Dunaj(Czech) Donau(Danish) Donau(Dutch) Donau(German) Duna(Hungarian) Donau(Norwegian) Dunaj(Polish) Dunaj(Slovak) Donau(Swedish)