Marcin Donesz (born December 19, 1982), better known by his stage name Onar, is a Polish rapper. He began rapping and producing in his teen years with the underground group TJK which culminated in opening for RunâÂÂD.M.C. during the Rap Day '97 concert in Warsaw. TJK fell apart shortly after, and Onar proceeded to form Pà Âomieà  81 with Pezet. As of then, Onar has recorded several solo albums.