What queen consort was the wife of William Alexander Frederick?
Prince Ernest Casimir of the Netherlands: Prince (William Alexander Frederick) Ernest Casimir of the Netherlands, Prince of Orange-Nassau (Dutch: "Willem Alexander Frederik Ernst Casimir, Prins der Nederlanden, Prins van Oranje-Nassau"; Soestdijk Palace, 21 May 1822 – Brussels, 22 October 1822) was the fourth son of the Prince of Orange, later King William II of the Netherlands and his wife Grand Duchess Anna Pavlovna of Russia. Anna Pavlovna of Russia: Anna Pavlovna of Russia (Russian: Анна Павловна ; Dutch: "Anna Paulowna"; 18 January 1795 — 1 March 1865) was a queen consort of the Netherlands.
Anna Pavlovna of Russia