Formally
The Queen must always be greeted formally as Your Majesty or Ma’am. But, the Royal Family let things slide for the grandchildren, allowing them to use their own affectionate names in private.
Formally
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Cath
Who knew that Prince Harry had a special nickname for Kate? Instead of calling the Duchess of Cambridge by her given name, he calls her “Cath,” a shortened version of her full name Catherine.
Cath
