It may be possible that the ancient name of the lower part of the river Danube, Ister, has the same source. Newer interpretations relate it to the Proto-Basque particle *(w)its-, "water", also seen in similar but otherwise unexplained river names, such as Vézère, Vizela, Weser and <MASK>.
ইসার
দানিউব Irlande দানিউবের Vistula