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Z2122 itself i much older than West Iranics. It is for sure Aryan because Z94 was in the BA pretty much restricted to Aryans but without ancient genomes we dont know when and with who it arrived. Could be even some Indo-Aryans like in Mitanni. It being common today among Jews and Iranians doe not mean it was restricted to them in the past. Founder effects and bottle necks can easily mislead us. Rather Z2122 has probably clades associated with various mostly Iranic groips but we need ancient dna to confirm that.
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