Many of us have been given nicknames from our family members in our childhood that just sticks into our adult years.
Even members of the royal family have endearing names for one another, from Prince Harry calling the Duchess of Cambridge 'Cath' instead of 'Kate', to the late Prince Philip being referred to as 'PP'.
Similarly, Prince William has an adorable little nickname for his daughter, six-year-old Princess Charlotte, which is very different to the one used by his wife Kate.
