- Geographical origin: "an dro" is a dance from the area of Vannes.
- Historical origin: "an dro" comes from "branles doubles" originally played during the Renaissance.
- Set: Circle dance. You hold your neighbour's little finger.
"An dro" steps are over 4 beats.
The arms movement is also made over 4 beats. Over the first 2 beats you "fold" your arms (like a snail) and over the 2 other beats you unfold them.
- Originally played on: Biniou / Bombarde, voice
- Derived and similar dances : Chanj tu, Trikot, Tour, Kas a barh
