There are multiple artists with this name. 1 - Annwn is a folk and medieval music project by Sabine Hornung (vocals) and Tobias von Schmude (lute and bouzouki). More information can be found at http://www.annwn-music.de/ and http://www.discogs.com/artist/Annwn+%282%29 2 - Heavily influenced by the Finnish metal scene, Annwn was founded in 2006 by Aled Pashley a.k.a. Owain ap Arawn, who recorded the first demo on his own. The band takes a lot of direction from folk/viking metal heroes Ensiferum and the genre-defying Wintersun. Read more on Last.fm