Louis Ernest of Brunswick-Lüneburg-Bevern was a field-marshal in the armies of the Holy Roman Empire and the Dutch Republic, the elected Duke of Courland. From 13 November 1750 to 1766 he was the Captain-General of the Netherlands, where he was known as the Duke of Brunswick or Duke of Brunswick-Wolfenbüttel. Another brother was Duke Ferdinand of Brunswick who led the Allied Anglo-German army during the Seven Years' War.
He was probably one of the first victims of the media in Dutch history.