Ernest Casimir I, Count of Nassau-Dietz

Count of Nassau-Dietz and Stadtholder of Groningen, Friesland and Drenthe (1574-1632) (1574–1632)

Parents

• Countess Elisabeth of Leuchtenberg
• John VI, Count of Nassau-Siegen

Children

• Elisabeth Friso van Nassau-Dietz
• Henry Casimir I of Nassau-Dietz
• William Frederick, Prince of Nassau-Dietz
• Maurice of Nassau-Dietz

Siblings

• William Louis, Count of Nassau-Dillenburg
• George, Count of Nassau-Dillenburg
• Elizabeth of Nassau-Dillenburg
• Anna Amalia of Nassau-Dillenburg
• Louis Gunther of Nassau
• Anne of Nassau-Dillenburg
• John Louis of Nassau-Hadamar
• Juliana of Nassau-Dillenburg
• Joaneta Elisabeth of Nassau
• Mary of Nassau-Dillenburg
• Magdalene of Nassau-Dillenburg
• Philip of Nassau
• Amalia of Nassau-Dillenburg
• John VII, Count of Nassau-Siegen
• Mathilda of Nassau-Dylenburg

Partners

• Sophia Hedwig of Brunswick-Lüneburg