 It is widely accepted that the name derives from , the Sanskrit name of the Indus river as well as the region at the lower Indus basin (modern Sindh).The Proto-Iranian sound change "*s" > "h" occurred between 850–600 BCE, according to Asko Parpola.The "-sh" suffix is common among the names of many Achaemenid provinces, such as (the land of "Harauvati" or "Haraxvaiti", i.e., Arachosia) or (Bactria).