This page is for the Romanian rapper. For the Canadian rock band, please change your tags to The Guess Who. Laurentiu Mocanu (born June 2, 1986), better known by his stage name Guess Who is a Romanian rapper. He began his career as a member of the rap group Anonim along with group members Zekko and Griffo, and later launched a successful solo career in music. He is one of the most successful artists from the new wave of Romanian hip hop and has gained considerable appreciation and mainstream attention..