What German doctor was also friends with Schack Carl Rantzau?
Johann Friedrich Struensee Johann Friedrich Struensee (5 August 1737 – 28 April 1772) was a German doctor. He became royal physician to the mentally-ill King Christian VII of Denmark and a minister in the Danish government. He rose in power to a position of ""de facto"" regent of the country, where he tried to carry out widespread reforms. His affair with Queen Caroline Matilda ("Caroline Mathilde") caused a scandal, especially after the birth of a daughter, Princess Louise Augusta, and was the catalyst for the intrigues and power play that caused his downfall and dramatic death.
Karl Eichwald Karl Eduard von Eichwald (4 July 1795, in Mitau, Courland Governorate – 10 November 1876, in Saint Petersburg; Russian: Эдуард Иванович Эйхвальд , "Eduard Ivanovich Eykhval'd") was a Baltic German geologist, physician, and naturalist, who worked in Russia.