John William Friso became the Prince of Orange in 1702. He was the Stadtholder of Friesland and Groningen in the Dutch Republic until his death by accidental drowning in the Hollands Diep in 1711. Wikipedia
Born: August 14, 1687, Dessau, Dessau-Roßlau, Germany
Died: July 14, 1711 (age 23 years), Hollands Diep, Netherlands
Great grandchildren: William I of the Netherlands, Frederick William, Prince of Nassau-Weilburg, Charles Louis, Hereditary Prince of Baden, and more
Children: William IV, Prince of Orange and Princess Amalia of Nassau-Dietz
Spouse: Marie Louise of Hesse-Kassel (m. 1709–1711)