There are at least 2 artists releasing music under the name "Pyrrhon".
1. Pyrrhon are an avant-garde metal outfit from New York. The lineup consists of Doug Moore (vocals), Dylan DiLella (guitar), Alex Cohen (drums) and Erik Malave (bass). They can be found at http://www.myspace.com/pyrrhonnyc and http://www.facebook.com/pages/Pyrrhon/48145607150.
2. Pyrrhon is also a pioneering extratone-speedcore artist from France. He is best known for his track "3. Read more on Last.fm