Henry Casimir II
Henry Casimir II by Lancelot Volders
Stadtholder of Friesland and Groningen
Reign	1664–1696
Predecessor	William Frederick, Prince of Nassau-Dietz
Successor	John William Friso, Prince of Orange
Prince of Nassau-Dietz
Reign	31 October 1664 – 25 March 1696
Predecessor	William Frederick, Prince of Nassau-Dietz
Successor	John William Friso, Prince of Orange
Born	(1657-01-18)18 January 1657 The Hague
Died	25 March 1696(1696-03-25) (aged 39) Leeuwarden
Burial	Grote of Jacobijnerkerk in Leeuwarden
Spouse	Henriëtte Amalia of Anhalt-Dessau ​ ​ (m. 1683)​
Issue Detail	Henriette Albertine John William Friso, Prince of Orange Maria Amalia Sofia Hedwig Isabelle Charlotte, Princess of Nassau-Dillenburg Johanna Agnes Louise Leopoldina Henriette Casimira
House	Orange-Nassau
Father	William Frederick, Prince of Nassau-Dietz
Mother	Albertine Agnes of Nassau

Henry Casimir II of Nassau-Dietz (Dutch: Hendrik Casimir II van Nassau-Dietz; 18 January 1657 – 25 March 1696) was Stadtholder of Friesland and Groningen from 1664 till 1696.

Henry Casimir II of Nassau-Dietz was born in The Hague, the eldest son of Willem Frederik of Nassau-Dietz and Countess Albertine Agnes of Nassau, daughter of Frederick Henry, Prince of Orange, stadtholder of Holland, Zeeland, Utrecht, Guelders, and Overijssel. When his father, a member of the branch of Nassau-Dietz, died in 1664, he was made stadtholder of Friesland and Groningen (under guardianship of his mother as he was then seven years old). In 1675, Friesland voted to make its stadtholdership hereditary in the house of Nassau-Dietz. Hendrik Casimir II was therefore the first Friesian stadtholder. In 1683, he married his cousin Henriëtte Amalia of Anhalt-Dessau, daughter of John George II, Prince of Anhalt-Dessau. Hendrik Casimir died in Leeuwarden, and was succeeded as stadtholder by his son Johan Willem Friso of Orange-Nassau.

From his marriage, Henry Casimir II had the following children:

• Willem George Friso (1685–1686), Hereditary Prince of Nassau-Dietz
• Henriette Albertine (1686–1754), Princess of Nassau-Dietz
• Johan Willem Friso (1687–1711), Stadholder in Friesland and Groningen
• Maria Amalia (1689–1771) Princess of Nassau-Dietz
• Sofia Hedwig (1690–1734), married in 1708 Duke Charles Leopold of Mecklenburg (1678–1747), son of Frederick, Duke of Mecklenburg-Grabow
• Isabelle Charlotte (1692–1757), married in 1725 Prince Christian, Prince of Nassau-Dillenburg (1688–1739), son of Henry, Prince of Nassau-Dillenburg
• Johanna Agnes (1693–1765), Princess of Nassau-Dietz
• Louise Leopoldina (1695–1758), Princess of Nassau-Dietz
• Henriette Casimira (1696–1738), Princess of Nassau-Dietz

• Media related to Henry Casimir II of Nassau-Dietz at Wikimedia Commons