Princess Philippine of Brandenburg-Schwedt (10 October 1745 – 1 May 1800); married Frederick II, Landgrave of Hesse-Kassel. Prince Georg Philipp Wilhelm of Brandenburg-Schwedt (3 May 1749 – 13 August 1751) Frederick William was 19 years older than the princess and he was called the "mad Margrave" because of his pranks and rude manners.
09/08/2022 · William had never married but had lived for 20 years with actress Dorothea Jordan. Soon after the death of Princess Charlotte of Wales, negotiations began for the marriage of William to Princess Adelaide of Saxe-Meiningen, and the engagement was announced on April 19, 1818. William was 52 and Adelaide was 25.