Swedish singer and guitarist, born December 23, 1974 in Poland, died December 26, 2004 in Phi Phi Island, Thailand.

He was the lead singer and guitarist of the Swedish grindcore bands Nasum, Genocide Superstars, Krigshot and Charles Hårfager. He co-founded [l274765] with Millencolin guitarist Mathias Färm. In 2004, Mieszko went on holiday to Thailand with his girlfriend during a break in between albums, and died in the tsunami disaster on December 26, 2004. His body was identified on February 16, 2005 and his remains were transported back to his hometown of Örebro, Sweden where his funeral was held on 30 March.