What Is Prince Louis' Full Name?

Prince Louis stole the spotlight during the Platinum Jubilee celebration of his great-grandmother, Queen Elizabeth II, with his funny and meme-worthy demeanor and adorable outfit.

Prince Louis, the youngest son of Prince William and Kate Middleton, made his carriage and balcony debut this year. The four-year-old prince looked adorable in a light blue sailor costume with side-swept bangs.

In his vintage attire, Louis pretty much looked like his loving father. The Duke of Cambridge donned the exact same beautiful suit on the same occasion in 1985, when he was just two years old.

WHY DID LOUIS BECOME A PRINCE?

Louis, whose playful expression at the event made headlines, has effortlessly won the hearts of royal fans. Born on April 23, 2018, William and Kate's youngest son's real name is His Royal Highness Prince Louis Arthur Charles of Cambridge.

Kate and William didn't choose names at random. The proud parents followed the royal family's tradition of selecting royal names that honor past monarchs, princes, and lords.

In French, Louis means "renowned warrior," but the beautiful name is also a tribute to the late Prince Philip's uncle, Lord Louis Mountbatten.

Meanwhile, the little boy's middle name, "Arthur," comes from Duke of Connaught and Strathearn, Prince Arthur, the former King of Camelot, and Queen Victoria's third son.

The charming boy's third and last name, "Charles," is clearly a tribute to Prince William's father and the future King of England, Prince Charles. Prince Harry also bears his father's name, the former's full name being Prince Henry Charles Albert David.

Louis's third name is popular within the royal family. The Duke and Duchess of Cambridge named their second child with a feminine version of "Charles"—Princess Charlotte.

Without his older brother, Louis would not be able to enjoy his official royal title. Queen Elizabeth II made several amendments to the royal regulations before the birth of Prince William and Kate's eldest son.

Back in 1917, Queen Elizabeth's grandfather, King George V, established a rule that determined who among the royal family members could hold official titles and who were too far from the family tree to be given titles.

King George V declared that all of the monarchy's children and grandchildren born through the male line would automatically become Princes or Princesses. However, the list excludes great-grandchildren.

Queen Elizabeth II overturned the nearly century-old rule with a brand new guidance, permitting her great-grandchildren to have royal titles attached to their names.

HOW MANY CHILDREN DOES PRINCE WILLIAM HAVE?

Louis is not Prince William's only son. The Duke of Cambridge has three children with Kate. Besides Louis, the royal couple is the proud parents of Prince George and Princess Charlotte.

On July 22, 2013, Prince George of Cambridge was born at St. Mary's Hospital in London and weighed 8lb 6oz (3.8kg). He is the third in line to the throne.

Meanwhile, on May 2, 2015, Kate and William welcomed their daughter at the same hospital where the couple's eldest son was born. Charlotte is fourth in line for the throne.