Origin of the Celts - Caucasian, not European The Celts are Circaesir from Circaesya, who lived on the Sea of Grass in what is now west Kazakhstan until late in the second millennium B.C. They were by their own definition a linguistic group, but now they are a culture. Contrary to popular belief, it is doubtful that they had anything to do with the Beaker Folk, who were Volsungrs (see 'Arthur'), ...