Mary of Great Britain may refer to:Mary II (1662–1694), queen regnant of England, Scotland and Ireland Princess Mary of Great Britain (1723–1772), second-youngest daughter of King George II Mary of Teck (1867–1953), queen consort, queen dowager and queen mother of the United Kingdom Princess Mary, Duchess of Gloucester and Edinburgh (1776–1857), fourth daughter of King George III Mary, Princess Royal and Countess of Harewood (1897–1965), only daughter of King George V