<Table> <Tr> <Th> Name </Th> <Th> Birth </Th> <Th> Death </Th> <Th_colspan="2"> Marriage </Th> <Th> Their children </Th> <Th> Their grandchildren </Th> </Tr> <Tr> <Th> </Th> <Th> </Th> <Th> </Th> <Th> Date </Th> <Th> Spouse </Th> <Th> </Th> <Th> </Th> </Tr> <Tr> <Td> Queen Elizabeth II </Td> <Td> 21 April 1926 </Td> <Td> </Td> <Td> 20 November 1947 </Td> <Td> Prince Philip, Duke of Edinburgh </Td> <Td> Prince Charles, Prince of Wales </Td> <Td> Prince William, Duke of Cambridge Prince Harry, Duke of Sussex </Td> </Tr> <Tr> <Td> Princess Anne, Princess Royal </Td> <Td> Peter Phillips Zara Tindall </Td> </Tr> <Tr> <Td> Prince Andrew, Duke of York </Td> <Td> Princess Beatrice of York Princess Eugenie </Td> </Tr> <Tr> <Td> Prince Edward, Earl of Wessex </Td> <Td> Lady Louise Windsor James, Viscount Severn </Td> </Tr> <Tr> <Td> Princess Margaret </Td> <Td> 21 August 1930 </Td> <Td> 9 February 2002 </Td> <Td> 6 May 1960 Divorced 11 July 1978 </Td> <Td> Antony Armstrong - Jones, 1st Earl of Snowdon </Td> <Td> David Armstrong - Jones, 2nd Earl of Snowdon </Td> <Td> Charles Armstrong - Jones, Viscount Linley Lady Margarita Armstrong - Jones </Td> </Tr> <Tr> <Td> Lady Sarah Chatto </Td> <Td> Samuel Chatto Arthur Chatto </Td> </Tr> </Table> <Tr> <Th> Name </Th> <Th> Birth </Th> <Th> Death </Th> <Th_colspan="2"> Marriage </Th> <Th> Their children </Th> <Th> Their grandchildren </Th> </Tr> <Tr> <Th> </Th> <Th> </Th> <Th> </Th> <Th> Date </Th> <Th> Spouse </Th> <Th> </Th> <Th> </Th> </Tr> <Tr> <Td> Queen Elizabeth II </Td> <Td> 21 April 1926 </Td> <Td> </Td> <Td> 20 November 1947 </Td> <Td> Prince Philip, Duke of Edinburgh </Td> <Td> Prince Charles, Prince of Wales </Td> <Td> Prince William, Duke of Cambridge Prince Harry, Duke of Sussex </Td> </Tr>

How did the queen mother get her title