"The baby will be known as His Royal Highness Prince Louis of Cambridge", Kensington Palace said.
Interestingly, Louis's famous parents are recorded only by their official titles: His Royal Highness Prince William Arthur Philip Louis Duke of Cambridge and Catherine Elizabeth Her Royal Highness the Duchess of Cambridge. He weighed 8 lbs. and 7 oz.
If the Cambridges follow the same pattern for the new royal baby as they did for their two other children Prince George and Princess Charlotte, we should expect to catch another glimpse of the little prince via a first official portrait. Louis hails from across the Channel in France where it is a traditional royal name. Arthur is also a name shared by the Duke of Cambridge and his father and Charles is, obviously the Prince of Wales's own name.
According to reports published before the announcement, Albert and Arthur were the odds-on name favorites.
But believe it or not, there's one major thing we noticed that makes Louis' certificate different from his siblings Prince George and Princess Charlotte's documents. It's also the name of Prince Philip's grandfather, Prince Louis Alexander of Battenberg.
Prince Louis was born just eight days ago, and he's already one of the most popular babies of 2018, next to all the Kardashian/Jenner babies, that is. The Queen ordered her stripped of the royal title upon their divorce. The Queen had flown from Windsor to Kensington Palace to see her sixth great-grandchild, Prince Louis, for the first time. William himself also recited his full name, confirming the correct pronunciation.