August Adolph von Hennings (19 July 1746, Pinneberg – 17 May 1826, Rantzau) was a politician, publicist and writer of the Age of Enlightenment, born into a Schleswig-Holstein family of lawyers. Active in Denmark and the German states, he was known as the "true apostle of the Enlightenment to the dukedoms"^[1] His elder sister Sophia (1742–1817) married the physician Johann Albert Heinrich Reimarus.