In July 1917 anti-German feeling during
World War I led
King George V to change the name of the
Royal House from the
House of Saxe-Coburg-Gotha to
House of Windsor. He also relinquished, on behalf of his various relatives who were British subjects, the use of all German titles and styles. Princess Henry relinquished the title of
Princess of Battenberg and resumed the qualification
Her Royal Highness The Princess Beatrice. Her two surviving sons assumed by Royal Warrant the surname Mountbatten and discontinued the use of the title Prince of Battenberg and the style Highness. Her elder son, Alexander ("Drino") was created Marquess of Carisbrooke, while the younger son, Leopold, assumed the courtesy title Lord Leopold Mountbatten. Her daughter,
Princess Victoria Eugénie, had by this time married King
Alfonso XIII of Spain, so no change in title, style, or surname was necessary.
In January 1919, George V created Princess Beatrice a Dame Grand Cross of the Most Excellent Order of the British Empire (G.B.E.), in recognition for her role as president of the Isle of Wight branch of the British Red Cross Society. She was created a Dame Grand Cross of the Order of St. John of Jerusalem in 1927 and a Dame Grand Cross of the Royal Victorian Order (G.C.V.O.) in 1937.