Sienna Elizabeth Mapelli Mozzi is the daughter of Edoardo Mapelli Mozzi and Princess Beatrice of York. She was born on September 18, 2021, in London, England. Sienna is a member of the British royal family, being the granddaughter of Prince Andrew, Duke of York and Sarah, Duchess of York. Her name, Sienna, is inspired by the Italian city known for its art and history, while Elizabeth honors her great-grandmother, Queen Elizabeth II. Sienna is the first child of Princess Beatrice, who is the eldest daughter of Prince Andrew and Sarah Ferguson.