When the future King and Queen of England welcomed their child into the world they decided to name him Louis Arthur Charles.Louis is a popular name within the royal family and is also the middle name of the five-year-old's father and older brother Prince George in honour of Charles' mentor Lord Louis Mountbatten, who was killed in an IRA bombing in 1979.
Charles is a nod to the young royal's grandfather and the British monarch, King Charles III, who said he was delighted to have another baby in the family when little Louis was born.
A statement from Charles and Camilla at the time said: "We are both so pleased at the news. It is a great joy to have another grandchild, the only trouble is I don’t know how I am going to keep up with them."William and Kate's youngest son's official title is His Royal Highness Prince Louis of Cambridge but the youngster only received a HRH title after his great-granny Queen Elizabeth II intervened, the Mirror reports.
The late monarch stepped in to overwrite a rule which had formerly been put in place by her father King George V, the Express reports.
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