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Here follows a list of children, grandchildren and great-grandchildren of King George III of the United Kingdom and Hanover and his wife, Charlotte of Mecklenburg-Strelitz. Their children include King George IV of the United Kingdom and Hanover, King William IV of the United Kingdom and Hanover, and King Ernest Augustus I of Hanover. Their grandchildren include Queen Victoria of the United Kingdom and King George V of Hanover. Their great-grandchildren include King Edward VII of the United Kingdom and Ernest Augustus, Crown Prince of Hanover.
Illegitimate grandchildren
Princess Charlotte, the Prince of Wales's daughter, was, for the whole of her life, the King's only legitimate grandchild. With her death in 1817, the King's unmarried sons scrambled to find appropriate wives from among the German princesses and produce heirs to the throne; but before this, many had been content to keep mistresses or, in the cases of the Prince of Wales and the Duke of Sussex, to marry invalidly. As a result, George III and Queen Charlotte had 56 illegitimate grandchildren.