Wilhelm Caspar Ferdinand Freiherr von Dörnberg KCB KCH[1] (14 April 1768 – 19 March 1850) was a German army officer who served in the French Revolutionary and Napoleonic Wars.

He accepted a commission in the Westphalian Guard in December 1807 and rose quickly in rank apparently gaining King Jerome's trust.

By the morning of April 23, a small yet organized French and Westphalian force (most of the 1st Cuirassiers under Oberst Marschall) led by GD Jean-Jacques Reubell opposed the southern mob of rebels that eventually gathered at the tiny hamlet of Knallhütte (now Kirchbauna) 10 kilometers south of Kassel and quickly dispersed them.

[2] Prior to the Battle of Waterloo, Dornberg detained a British scout who was bringing news of Napoleon’s troop movements to Wellington.

British Senior Intelligence Officer Colquhoun Grant attributed the subsequent loss at Ligny to the “stupidity of a Hanoverian cavalry brigadier”.