“in northern India, rivers in general have early Sanskrit names from the Vedic period, and names derived from the daughter languages of Sanskrit late… - Michael Witzel

Ironically, many of those expressing these anti-migrational views are emigrants themselves, engineers or technocrats like N. S. Rajaram... who ship their ideas to India from U.S. shores.

“Book 8 concentrates on the whole of the west: cf. camels, mathra horses, wool, sheep. It frequently mentions the Sindhu, but also the Seven Streams, mountains and snow.” [This MaNDala] “lists numerous tribes that are unknown to other books”. [In this MaNDala,] “camels appear (8.5.37-39) together with the Iranian name KaSu, ‘small’ or with the suspicious name Tirindra and the ParSu (8.6.46). The combination of camels (8.46.21, 31), Mathra horses (8.46.23) and wool, sheep and dogs (8.56.3) is also suggestive: the borderlands (including GandhAra) have been famous for wool and sheep, while dogs are treated well in Zoroastrian Iran but not in South Asia.” (pp. 317-322)

Other evidence, from Mitanni and neo-Hittite sources, indicates that the names of Mitanni kings were traditionally Indo-Aryan, even though the Mitanni belonged to the Hurrian-speaking peoples. We therefore surmise that the Mitanni once lived close to an early Indo-Aryan group, that had perhaps taken a dominant position over the pre-Mitanni population, and then became quickly acculturated as Hurrian speakers.