Prince of Orange. Born Karl Heinrich Friso von Nassau-Dietz, the son of Johann Willem Frisovan Oranje-Nassau, Prince of Orange and Marie Luise von Hessen-Kassel. A posthumous child, he succeeded his father's titles at birth, under the regency of his mother until the age of twenty. In March 1734 he married Anne, the Princess Royal, daughter of George II King of Great Britain at the Chapel Royal in St James Palace, London. After suffering at least three stillborn children, the couple produced three living children, two of whom survived to adulthood including the future Willem V of Orange. In April of 1747, during the War of the Austrian Succession, he became the stadholder of all the provinces of the Republic. He succeeded to the title of Prince Willem IV of Orange the same year. He died at the Haugue at age 40.
Bio by: Iola
Johan Willem Friso von Nassau-Diez
Anne Hanover von Nassau-Dietz
1709–1759 (m. 1734)