Princess Charlotte of Wales (1796–1817)
Princess Charlotte of Wales (Charlotte Augusta; 7 January 1796 – 6 November 1817) was the only child of George, Prince of Wales (later George IV), and Caroline of Brunswick. She was expected to ascend the British throne after the deaths of her grandfather, George III, and her father, but died in childbirth at the age of 21, predeceasing them both.
Source: Wikipedia — Princess Charlotte of Wales (1796–1817) (CC BY-SA 4.0)