Five days after his birth, we finally know the chosen name of the new son of the Duke and Duchess of Cambridge.
Louis Arthur Charles has been formally announced by Kensington Palace as the name of the fifth in line to the throne, after his grandfather Prince Charles, father Prince William, and siblings Prince George and Princess Charlotte.
Prince Louis shares his middle name with father Prince William and grandfather Prince Charles, with William’s full name being William Arthur Philip Louis.
Born from the old Frankish words for “fame” and “warrior”, Louis has proved to be a popular and notable name throughout history, including the beloved great-uncle of Prince Charles.
The Earl Mountbatten of Burma, who was also the Duke of Edinburgh’s uncle and the brother of his mother, Princess Alice, was murdered by the IRA in 1979.
Known as Uncle Dickie by his family, he was the last British Viceroy of India before independence in 1947 and was very close to Charles.
The IRA blew up his boat while he was on a fishing trip off the coast of County Sligo in the Republic of Ireland.
Another Louis with links to the Royals is Prince Louis Mountbatten, who was the grandfather of Phillip.
He was born in Austria in 1854 and was brought up in Italy and Germany, but enrolled in the Royal Navy at the age of 14 and enjoyed a career on the seas lasting more than 40 years.
He married into the British monarchy through Princess Victoria, the granddaughter of Queen Victoria and Prince Albert.
Prince Louis renounced his German titles after the First World War, having previously been known as Prince Louis of Battenberg. He died shortly before Prince Phillip was born in 1921.
There are plenty of other Royal Louis’ throughout European history, from Germany and France to Portugal and the Netherlands, most famously Louis XIV of France, who reigned from 1643 until his death in 1715.
But beyond thrones and castles, the name has also made its mark in the realms of science, sports and entertainment.
French educator Louis Braille invented the system of reading and writing upon which visually impaired people still rely upon today.
Fellow Frenchman Louis Vuitton remains an iconic name in the world of fashion.
The designer was born in France in 1821 and went on to start his own business, which Forbes now lists as having a value of $28.8bn (£20.9bn).
Considered one of the most influential artists in the history of jazz, Louis Armstrong is probably best known for What A Wonderful World, released in 1967.
It came just four years before his death at the age of 69.
Since then his work has continued to be celebrated and last year he was inducted into the Rhythm and Blues Hall of Fame, alongside the likes of Michael Jackson and Whitney Houston.
A more modern artist to have enjoyed plenty of chart success is One Direction star Louis Tomlinson, who has also made the charts as a solo artist.
In 2013, he was signed as a footballer by Championship side Doncaster Rovers, although since then he has mostly been resigned to appearing in charity games.
He certainly never caught the attention of Louis van Gaal during his Manchester United tenure.
The Dutch manager was at Old Trafford from 2014 to 2016, having previously led his national side, Bayern Munich, Ajax and Barcelona.
Another recognisable face from our TV screens is documentary maker Louis Theroux, who has won two BAFTAs and a Royal Television Society Award for his work.
But despite so many famous examples, Louis is only the 71st most popular name in England and Wales, according to the latest available figures from the Office for National Statistics.
In 2016, just 911 boys were given the name Louis in England and Wales.
Prince Louis’ siblings are certainly more likely to come across schoolmates with the same name as them, with Charlotte ranked as the 12th most popular girls name and George in third place for boys.
Louis was more popular in the early 2000s when it ranked around 39th, but was not popular throughout the 20th century.