So what is the meaning behind the child's newly announced moniker?
Although Prince Harry and Meghan haven't confirmed whether Archie is short for Archibald, it is a derivative of the name.
Archibald is derived from the Germanic elements ercan, meaning "genuine", and bald, meaning "bold".
The name became popularised in Scotland during the Middle Ages.
Medieval forms of the name include the Old High German "Erchambold", and the Anglo-Saxon "Eorcenbald".
The baby's middle name, Harrison, is of particular significance for the child's father, Prince Harry.
As is implied by the structure of the name, it means "son of Harry".
The name Harrison, predominantly used as a surname, is of English origin, increasing in popularity in the US in recent years.
Prince Harry and Meghan's choice to use the name as one of the royal baby's monikers thus highlights the connection the Sussexes have forged between the UK and the US through their partnership.
High-profile individuals with whom the baby shares its middle name include Star Wars actor Harrison Ford, Beatles guitarist George Harrison and the 23rd US president Benjamin Harrison.
No British monarch of Great Britain has ever been named Archie or Harrison.
As for the baby's surname, the royal family states that some members of the family often do not have one.
However, it has been confirmed that the baby's surname is Mountbatten-Windsor.
In 1917, the reigning King George V chose Windsor as the surname of the royal family.
During a meeting of the Privy Council on 17 July 1917, the monarch stated that "all descendants in the male line of Queen Victoria, who are subjects of these realms, other than female descendants who marry or who have married, shall bear the name of Windsor".
In 1960, eights years after Queen Elizabeth II's ascension to the throne, she and the Duke of Edinburgh decided that their descendants would be distinguished by the double-barrelled surname Mountbatten-Windsor.
The announcement from the Queen stated: "My descendants other than descendants enjoying the style, title or attribute of Royal Highness and the titular dignity of Pince or Princess and female descendants who marry and their descendants shall bear the name of Mountbatten-Windsor."
It was revealed today that Archie Harrison Mountbatten-Windsor will not be granted any courtesy titles by the Queen, in accordance with Prince Harry and Meghan's wishes.
The first photographs of the baby were released today, taken at St George's Hall in Windsor Castle.