Sometime in the 90s I was in a band with fiddler who went to Rainbow Gatherings, hippie folk camps that happened at various places around Europe. She came back from one in Portugal with a reel/scottische that she called "Galician Solstice Song". It was actually a sped-up version of Cantigas de Santa Maria 159, "Non sofre Santa Maria". I presume some revival folkie of the time thought of it.