There are at least three bands with the name 'Greyhaven': 1) An American progressive rock/metal band from Eugene, Oregon/Boston, Massachusetts, formed in 1996 2) A British alternative rock band from London, formed in 2014. 3) American progressive metalcore/mathcore/chotic hardcore band from Louisville, Kentucky. 1) Greyhaven began in November 1996 when Ethan Matthews and Nate Howard began meeting and trading musical ideas. Nate had answered a call for musicians posted by Ethan at a local music shop