Siddi is a Welsh duo formed in Llanuwchllyn in 2010 by sister and brother Branwen Haf and Osian Huw Williams who have also contributed to several other musical groups including Cowbois Rhos Botwnnog and Candelas.

The duo's first album, Un Tro, was released in 2013. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.