Quoting from The Regions of Spain: A Reference to History and Culture, by
Robert W. Kern, 1995, "Folk music is dominated by the Muineira Gallega, songs
in 6/8 time accompanied by the gaita gallega (bagpipes, usually green in color)
and the tamboril, a small drum. The dances to this music aree very old, said
to be of Greek, Suevi, or Celtic origin. A single couple dominates the first
phase, with the male dancer acting out a courtship, then kneeling to his
partner before they dance together. Other couples join in the dance at a
gallop, dancing in large sweeping motions until the women form an inner circle
and the men an outer one. Several men then stage a mock battle or dance
competition before the couples rejoin the dance and finish with a step similar
to Scottish Highlanders' flings or reels, with a beat of the foot behind the
knee, almost a jump step."
There are also a few other references to Galicia's ancient Celtic past in the
chapter on Galicia.