Johannes Bonn is a character that's mentioned in the Armageddon's Blade campaign in Heroes of Might and Magic III: Armageddon's Blade. As Gelu's forces drew near Kreelah, they captured Judge Sleen, a sage that had worked for Xeron. After revealing everything he knew, Sleen was sent to Steadwick in chains, where General Kendal appointed Johannes Bonn to be his judicator. Johannes sentenced Sleen to spend the rest of his life in prison, where he would be doing hard labor in solitary confinement.