William IV was King of the United Kingdom of Great Britain and Ireland and King of Hanover from 26 June 1830 until his death. He was the third son of King George III. William married Adelaide of Saxe-Meiningen and had two daughters (Charlotte and Elizabeth) but was also known to have ten illegitimate children.

Note that on coins, William IV is often written as GULIELMUS IIII .

		1834 Half Crown Mintage: 993,100
		1836 Half-Crown - William IV Mintage: 1,588,750