House of Hanover Great Britain and Ireland:" "Of the United Kingdom of Great Britain and Ireland:" George I, George II, and George III also served as electors and dukes of Brunswick-Lüneburg, informally, Electors of Hanover (cf. "personal union"). From 1814, when Hanover became a kingdom, the British monarch was also King of Hanover. In 1837, the personal union of the thrones of the United Kingdom and Hanover ended with the death of William IV. Succession to the Hanoverian throne was regulated by semi-Salic law (agnatic-cognatic), which gave priority to all male lines before female lines, so that it passed not to Queen Victoria
George III of the United Kingdom George III of the United Kingdom George III (George William Frederick; 4 June 1738 – 29 January 1820) was King of Great Britain and King of Ireland from 25 October 1760 until the union of the two countries on 1 January 1801, after which he was King of the United Kingdom of Great Britain and Ireland until his death in 1820. He was concurrently Duke and prince-elector of Brunswick-Lüneburg ("Hanover") in the Holy Roman Empire before becoming King of Hanover on 12 October 1814. He was the third British monarch of the House of Hanover, but unlike his two predecessors,