Richard Jonckheere, better known by his stage names Richard 23 and Richard JK, is a Belgian musician. He is a member of Front 242 and was a founding member of Revolting Cocks. He released the EP Free Tyson Free! with Jean-Pierre Everaerts and Marc Desmare, using the moniker Holy Gang, and two 12-inch singles in 1999/2000 as LaTchak.