What is William IV of the United Kingdom?
{{Infobox royalty | name = William IV | image = William IV crop.jpg | succession = [[Monarchy of the United Kingdom|King of the United Kingdom]] | reign = 26 June 1830 – 20 June 1837 | coronation = 8 September 1831 <!--<br /> 17 December 1835 (Scotland)--> | predecessor =[[George IV of the United Kingdom|George IV]] | successor =[[Queen Victoria|Victoria]] | birth_date = 21 August 1764 | birth_place = [[Buckingham Palace]], [[London]], [[England]] | death_date = {{death date and age|1837|6|20|1764|8|21|df=yes}} | death_place = [[Windsor Castle]], [[Windsor]], [[Berkshire]], [[England]] |burial_place = [[St. George's Chapel at Windsor Castle|St. George's Chapel]] | spouse = {{marriage|[[Adelaide of Saxe-Meiningen]]|11 July 1818}} | house = [[House of Hanover|Hanover]] | father = [[George III]] | mother = [[Charlotte of Mecklenburg-Strelitz]] }} '''William IV''' (William Henry; 21 August 1764 – 20 June 1837) was King of the [[United Kingdom of Great Britain and Ireland]] and of [[Hanover]] from 26 June 1830 until his death. William, the third son of [[George III of the United Kingdom]] and younger brother and successor to [[George IV of the United Kingdom|George IV]] was the last person to rule both the United Kingdom and [[House of Hanover|Hanover]]. His niece, [[Queen Victoria|Victoria]], ruled only the United Kingdom, not Hanover. He lived for 20 years with Dorothea Jordan. They had ten children. ==Early life== William, Henry was born in 21 August 1765 to the king of England, George III at Buckingham House. He was baptized on 20 September 1765. He joined the royal navy at the age of 13, as a midshipman. He served in the battle of Cape St. Vincent. In 1785, he became a lieutenant and was transferred to the West Indies. He wanted to be a duke like his older brothers, but his father refused. He had an affair with a woman named Doro Jordan from 1791, and she mothered 10 children of his. In 1820 when his father died he became secon