Crwth refers to 2 bands 1) A now defunct american rock band from Chantilly, VA. They were formed in 2007, and got together in July of 2009 to record some tracks together, leading to their self-titled release. 2) A german progressive/alternative rock band from Leipzig, founded in 2003, signed to High Live Records. They released their debut album, Time Wasted is Time Lost, in 2010, and their follow-up, Reflections, in 2014. They remain active , playing in Leipzig and Dresden, among other places.