Princess Sophie of Greece and Denmark was by birth a Greek and Danish princess, as well as Princess of Hesse-Kassel and Princess of Hanover through her successive marriages to Prince Christoph of Hesse and Prince George William of Hanover. An elder sister of Prince Philip, Duke of Edinburgh, she was, for a time, linked to the Nazi regime.

Prince Christoph of Hesse was a nephew of Kaiser Wilhelm II. He was an SS-Oberführer in the Allgemeine SS and an officer in the Luftwaffe Reserve, killed on active duty in a plane crash during World War II. His brother-in-law, Prince Philip of Greece and Denmark, fought on the British side and married the future Queen Elizabeth II after the war.