Born in 1613, second son of Ernst Casimir. Becomes baron of Nassau Dietz in 1640 after the death of his brother Hendrik Casimir I at the battle of Hulst. He was also the viceroy of Friesland and Groningin. He dies in 1664.
Description:
Copper engraving of Willem Frederik Baron of Nassau Dietz, engraved by Jacobus Houbraken from the original of A Schouman.