Who dated Karoline von Schlotheim?

Karoline von Schlotheim (6 July 1766 - 7 January 1847) was a German noblewoman who was the third and final mistress of William I, Elector of Hesse from 1788 until 1811.

William I, Elector of Hesse (German: Wilhelm I., Kurfürst von Hessen; 3 June 1743 – 27 February 1821) was the eldest surviving son of Frederick II, Landgrave of Hesse-Kassel (or Hesse-Cassel) and Princess Mary of Great Britain, the daughter of George II.