The Celts (Gauls) - Indo-European tribes known from the second to the beginning of the first millennium BC - in continental Europe by the middle of the first century AD were subjugated by the Romans and, having assimilated within a few centuries (from the first to the fourth), essentially disappeared from its historical map. However, leaving an eternal memory in the names of cities such as, for example, Paris, Milan, Vienna, and rivers such as the Seine, Rhine, Danube, they were still divided into Irish and Welsh, which continued to develop on the islands two main branches of the Celtic language and Celtic culture. It would seem that the legends, myths, legends of the Welsh should have disappeared from the face of the earth. But, fortunately, this did not happen. Folk heritage survived...