 On 24 April 1900, Queen Victoria issued another Letters Patent by which she created for The 1st Duke of Fife the further dignities of Duke of Fife and Earl of Macduff, both in the Peerage of the United Kingdom, and both with a special remainder that allowed these titles to pass to his daughters, in default of a son, and then to the male heirs of those daughters.The one restriction was that the mother of those daughters had to be Princess Louise; daughters from any subsequent marriage could not inherit.On 9 November 1905, King Edward VII granted to Alexander Duff's two daughters Lady Alexandra (* 1891) and Lady Maud (* 1893) the styles of "Highness" and "Princess".