Speculations and theories were shared across social media platforms about what the name could be, and bets were placed. Arthur, Philip, James, and Edward had the highest odds.
The nation waited a record four days for the name of the newest heir to be released. The names of his older siblings, Prince George and Princess Charlotte, were announced within two days.
Then, Kensington Palace made the much-anticipated announcement: the young Prince would be known as Prince Louis of Cambridge.
His full names are Louis Arthur Charles, and he will hold the title of His Royal Highness Prince Louis of the United Kingdom of Great Britain and Northern Ireland.
'Louis' is derived from the Old German word which means 'famous warrior.'
The name carries significant meaning, and Louis could be a nod to Queen Elizabeth's second cousin, Lord Louis Mountbatten, also known as the Earl Mountbatten of Burma.
Louis is also the third name of 4-year-year-old Prince George, and the fourth name of his 35-year-old father, the Duke of Cambridge.
Prince Louis' second name, Arthur, also has ties to the British Royal Family and could refer to Prince Arthur of House Windsor, son of Queen Victoria and Prince Albert. Arthur means 'noble and courageous.'
It could also refer to Arthur Tudor who was born in 1486. He held the titles of Prince of Wales and Duke of Cornwall. Coincidentally, those titles currently belong to Prince Louis' grandfather, Prince Charles.
That brings us to his third name: Charles. Not only is it a nod to his paternal grandfather, but it is also from the Germanic name 'Karl,' and means 'manly' or 'free man.'
Prince William's third child will be fifth in line to the throne, after his grandfather, father, brother Prince Charles, and sister Princess Charlotte.
'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.'
Prince Charles, Twitter, April 24, 2018.
Members of the Royal family forego the use of surnames. When it is required, the male descendants of Queen Elizabeth and Prince Phillip are known as Mountbatten-Windsor.
When Kate Middleton, whose full names are Catherine Elizabeth Middleton, married Prince William in 2011, she dropped her second names and surname and became known as Catherine, Duchess of Cambridge, Vanity Fair reported.