William IV of the United Kingdom

William IV was king of the United Kingdom from 1830 to 1837. Known as the "Sailor King" due to his naval career, he was the third son of King George III. His reign saw significant social and political change, including the passing of the Reform Act 1832, which expanded voting rights. William IV was more popular than his predecessors and supported various reforms. He had no surviving legitimate children, and upon his death, his niece Victoria ascended to the throne, marking the beginning of a new era in British history.