George I (1660–1727) was elector of Brunswick-Lüneburg and after the death of Queen Anne (1665–1714) he was also crowned king of Great Britain. He was the first monarch to rule Great Britain and the so-called "Kurhannover", which became the kingdom of Hanover in 1814, in a personal union, or union of crowns.
Jakob Christoph Le Blon (1667–1741), Portrait of King George I, mezzotint from a painting by Sir Godfrey Kneller, 1721; image source: https://www.britishmuseum.org/collection/object/P_1875-0710-1482, © The Trustees of the British Museum.