Overview
Henry Casimir I of Nassau-Dietz (21 January 1612 – 13 July 1640) was count of Nassau-Dietz and Stadtholder of Friesland, Groningen and Drenthe.
Life
He was born in Arnhem, the eldest son of Ernst Casimir of Nassau-Dietz and Sophia Hedwig of Brunswick-Lüneburg, and, like his father, died in battle.
Henry Casimir was christened at Arnhem. The English representative, Sophia Hedwig being the niece of the queen Anne of Denmark, was Sir Edward Cecil. He brought gifts of a cupboard of gilt plate, a diamond necklace with a locket, horses, and an embroidered petticoat for Sophia Hedwig.
He became count of Nassau-Dietz and stadtholder of Friesland, Groningen and Drenthe upon the death of his father, Count Ernst Casimir of Nassau-Dietz, at the Siege of Roermond in June 1632. A week later, he was involved in the Capture of Maastricht, along with his cousin, Frederick Henry, Prince of Orange.
From Wikipedia (CC BY-SA 4.0).