Henry Casimir II of Nassau-Dietz was Stadtholder of Friesland and Groningen from 1664 till 1696.
Background
He was the eldest son of Willem Frederik of Nassau-Dietz and Albertine Agnes of Nassau, daughter of Frederick Henry, Prince of Orange, stadtholder of Holland, Zeeland, Utrecht, Guelders, and Overijssel. When his father died in 1664, he was made stadtholder of Friesland and Groningen (under guardianship of his motherm as he was then seven years old).
Career
In 1675, Friesland voted to make its stadtholdership hereditary in the house of Nassau-Dietz. Hendrik Casimir II was therefore the first Friesian stadtholder. 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.