William II (Dutch: Willem II, French: Guillaume II; 6 December 1792 – 17 March 1849) was King of the Netherlands, Grand Duke of Luxembourg, and Duke of Limburg. He reigned for nearly nine years, making him the shortest-reigning monarch in Dutch history.
William II was the son of William I and Wilhelmine of Prussia. When his father, who up to that time ruled as sovereign prince, proclaimed himself king in 1815, he became Prince of Orange as heir apparent of the United Kingdom of the Netherlands. With the abdication of his father on 7 October 1840, William II became king. During his reign, the Netherlands became a parliamentary democracy with the new new constitution of 1848. William II was married to Anna Pavlovna of Russia, with whom he had five children.