Indo-Aryan peoples
Ancient and modern Iranian peoples mostly descend from the Proto-Indo-Iranians, common ancestors respectively of the Proto-Iranians and Proto-Indo-Aryans, this people possibly was the same of the Sintashta-Petrovka culture. Proto-Iranians separated from the Proto-Indo-Aryans early in the 2nd-millennium BCE. These peoples possibly called themselves by the name "Aryans", which was the basis for several ethnonyms of Iranian and Indo-Aryan peoples or for the entire group of peoples which shares kin and similar cultures.