William Frederick, Prince of Nassau-Dietz Count of Nassau-Dietz, Stadtholder of Friesland, Groningen and Drenthe (1613–1664) (1613–1664) Parents Sophia Hedwig of Brunswick-Lüneburg Ernest Casimir I, Count of Nassau-Dietz Children Amalie of Nassau-Dietz Prince Hendrik Casimir II, Prince of Nassau-Dietz Siblings Elisabeth Friso van Nassau-Dietz Henry Casimir I of Nassau-Dietz Maurice of Nassau-Dietz Partners Countess Albertine Agnes of Nassau
