Charles Louis Dieudonné Grandjean (29 December 1768 – 15 September 1828) became a French division commander and saw extensive service during the Napoleonic Wars. In 1792 he gave up his legal career to enlist in the infantry and served in the Army of the Rhine. In March 1799 he earned promotion to general of brigade by distinguished actions at Verona. That year he led an Army of Italy brigade at Magnano, the Trebbia, Novi and Genola. In 1800 he fought at Stockach and Hohenlinden.