Her father, Prince William was heard using it when Prince George, Princess Charlotte and Prince Louis visited the Chelsea Flower Show in 2019 to see the 'Back to Nature Garden' that the Princess of Wales had co-created.
Prince William and Kate Middleton's sweet nicknames for daughter Princess Charlotte Royals opt to use funny, affectionate nicknames when talking about one another, much like any other family.
It is a royal tradition that while a royal is at school or while they are working in a professional capacity that they are known by their first name and use their parent's title as a last name.
For example, Princess Beatrice and Princess Eugenie were known to use that style, rather than be known as Beatrice and Eugenie York.
As the official last name of the Royal Family is Mountbatten-Windsor, many royal children use that surname at school.
