""In Europe, river names were found to reflect the languages spoken before the influx of Indo-European speaking populations. They are thus older than c. 4500-2500 B.C. (depending on the date of the spread of Indo-European languages in various parts of Europe)... “in northern India rivers in general have early Sanskrit names from the Vedic period, and names derived from the daughter languages of Sanskrit later on" (WITZEL 1995a:104-105)."