Kristiansen, Kristian; Kroonen, Guus; Willerslev, Eske (11 May 2023). The Indo-European Puzzle Revisited: Integrating Archaeology, Genetics, and Linguistics. Cambridge University Press. pp.70–71. ISBN978-1-009-26174-6. "How exactly the emergence and expansion of the Corded Ware are linked to the emergence and expansion of the Yamnaya horizon remains unclear. However, the Y chromosome record of both groups indicates that Corded Ware cannot be derived directly from the Yamnaya or late eastern farming groups sampled thus far, and is therefore likely to constitute a parallel development in the forest steppe and temperate forest zones of Eastern Europe. Even in Central Europe, the formation of the earliest regional Corded Ware identities was the result of local and regional social practices that resulted in the typical Corded Ware rite of passage."
"Hindi" L1: 322 million (2011 Indian census), including perhaps 150 million speakers of other languages that reported their language as "Hindi" on the census. L2: 274 million (2016, source unknown). Urdu L1: 67 million (2011 & 2017 censuses), L2: 102 million (1999 Pakistan, source unknown, and 2001 Indian census): Ethnologue 21. Hindi at Ethnologue (21st ed., 2018) . Urdu at Ethnologue (21st ed., 2018) .
Schmitt 1987: "The name Aryan is the self designation of the peoples of Ancient India and Ancient Iran who spoke Aryan languages, in contrast to the 'non-Aryan' peoples of those 'Aryan' countries."Schmitt, Rüdiger (1987). "Aryans". Encyclopædia Iranica. Vol.2. Iranica Foundation.