Graeco-Aryan refers to a hypothesis that the Proto-Greek and the Proto-Indo-Iranian languages share a common history separate from the remaining Indo-European languages (Colin Renfrew, Fortson, and Clackson, 1994). Graeco-Aryan has support among quite a number of linguists, and both geographical and temporal distribution of Proto-Greek and Proto-Indo-Iranian fit well with the Kurgan hypothesis, associating late PIE with the 4th millennium BC Yamna culture, and this's consistent with a roughly mi… (More on Graeco-aryan)