There are at least 7 bands called Klan. 1) Klan was a polish band formed in 1969 in Warsaw and headed by guitarist/vocalist Marek Ałaszewski. His mates were keyboard player Maciej Głuszkiewicz, bassist Roman Pawelski and drummer Andrzej Poniatowski. After releasing a self-titled E.P. in 1970, lyricist Marian Skolarski joined the band and composed “Mrowisko”. In 1993, Allaszewski reformed KLAN and released an album called “Po Co Mi Ten Raj”.