Reddit reviews Danse En Dro (Breton Circle Dance)

Eluveitie makes use of a lot of tradition folk tunes in their songs. Chrigel, the band's lead vocalist and songwriter, put together a list of some of the tunes that they used here.

As you can see, the tune is known as En Dro (or An Dro) and it's an old Breton dance tune. The name apparently means "The Turn," which can be a little misleading because it can be used to describe a style of dance rather than the tune itself -- that means you'll probably find other tunes given the same name because they were used for the same style of dance.

Edit: Case in point: Eluveitie have a track called Andro on their first album. Same name because it's the same type of dance, but a different source tune.

I found a few instances of other people performing their versions of this specific tune:

• [Robert Culbertson doing a cool arrangement of the tune on a Chapman Stick] (http://www.youtube.com/watch?v=HTS2yF3ljwQ)
  
  
• A sample from a traditional band called Gallowglass performing their arrangement