They were also proto-Semites, proto-Hebrews, and proto-a lot of other peoples too.
Even a Tocharian or two here and there. (I knew as soon as I wrote that, that I would hear from you. smile)
Tocharians: Lost Tribe Of Xinjiang Province
These folks are believed to be the descendents of the oldest Caucasian mummies found in the deserts of east central China. The only thing they left behind was their language, Tocharian A & B. (...and maybe C )