You may be interested to know that in the so called 'celtic' Gallaecia (NW Iberia) the 'curros' - also known as 'curros vedros' or 'curros veteros' - were the stone circles which still serve to keep the cattle in summer, when the weather is (only) slightly better than in the winter.

Another bit of etymological 'coincidence' in the roots of words I'd say.

By the way, like in Wales, stone circles are not too common in this area although one researcher is struggling to date them to the neolithic before it is too late for them, since, unlike the barrows or the dolmens, they are not legally protected.