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.
Wilhelmina of Prussia, Princess of Orange Princess Wilhelmina of Prussia ("Frederika Sophia Wilhelmina"; 7 August 1751 in Berlin – 9 June 1820 in Het Loo) was the consort of William V of Orange and the de facto leader of the dynastic party and counter-revolution in the Netherlands. She was the daughter of Prince Augustus William of Prussia and Luise of Brunswick-Wolfenbüttel. Wilhelmina was the longest serving Princess consort of Orange.