I am trying to understand the relation between languages and Y-DNA lineages.
From R1a tree we see that R1a-Z645 was split into R1a-Z283 and R1a-Z93.
Both Z93 and Z283 correlate with satem languages. Z93 with Indo-Iranian languages and Z283 with Baltic and Slavic languages. Indo-Iranian, Baltic and Slavic languages are moreover closely related and originated in Eastern Europe, some linguists say that some sort of Indo-Iranian-Baltic-Slavic linguistic continuum existed in the past.
So it seems natural to me to put those R1a lineages on language tree by Warnow as follows:
I would like to learn about correlations between other languages and Y-DNA lineages. Could you make some proposals.