Hey there, you know Prince Harry? Grandson to Queen Elizabeth? Husband to Meghan Markle and father of Archie? Person who somewhat dramatically quit the royal family and is sixth in line to the throne? Well, a couple fun facts about his name: first of all, it's not Harry. It's Henry!

And while we're at it, his full name is Henry Charles Albert David, which begs the question...does Harry just...not have a last name? TBH, it's complicated due to a bunch of various rules and proclamations, so let's get into it.

No, Harry Doesn't Technically Have a Last Name

Due to being royal, Harry doesn't have a last name like us mere mortals. In fact, the official name listed on his son Archie's birth certificate is His Royal Highness Henry Charles Albert David Duke of Sussex. (Side note: Imagine your occupation being "Prince of the United Kingdom.)

the birth certificate of archie harrison mountbatten windsor, son of the duke and duchess of sussex, who was born at the portland hospital in london photo by jonathan bradypa images via getty images
Jonathan Brady - PA Images//Getty Images

However! Back when he served in the military, Harry used the last name "Wales" and was known as Captain Harry Wales, according to a circa 2011 Telegraph article.

honington, united kingdom   july 14  prince harry visits raf honington on july 14, 2010 in suffolk, easten england during his visit, prince harry was shown fuchs armoured vehicles that have been adapted to detect deadly gases on battlefields, watched recruits in training, officially opened a new mess and met wives of servicemen  photo by ben stansall   wpa poolgetty images
WPA Pool//Getty Images

So, Where'd Archie Mountbatten-Windsor Come From?

While Harry doesn't technically have a last name, his son Archie uses Mountbatten-Windsor. Why, you ask?! It's a little complicated, but TL;DR: this name came into royal use back in 1960, when the Queen and Prince Philip decided they wanted their non titled descendants (read: royals who don't use HRH) to have their ~own special last name~.

The royal family's website states that "The Queen's descendants, other than those with the style of Royal Highness and the title of Prince/Princess, or female descendants who marry, would carry the name of Mountbatten-Windsor." Which is why Archie (who doesn't have a title!) uses the last name and Harry (who is a Prince!) does not.

windsor, england   may 08 prince harry, duke of sussex and meghan, duchess of sussex, pose with their newborn son archie harrison mountbatten windsor during a photocall in st georges hall at windsor castle on may 8, 2019 in windsor, england the duchess of sussex gave birth at 0526 on monday 06 may, 2019 photo by dominic lipinski   wpa poolgetty images
WPA Pool//Getty Images

Psst: In case you're curious, "Mountbatten" is the last name of Prince Philip's maternal grandparents, while "Windsor" is the surname George V gave his descendants before Elizabeth switched things up.

So, What Happens Now That Harry's Not a HRH?

At this point you might be wondering what's going to happen now that Harry is no longer using His Royal Highness amid stepping down from the royal family. While he could start using the last name Mountbatten-Windsor, he apparently hadn't signed any paperwork with that name as of last April. So for now, he's simply Harry, Duke of Sussex (or Prince Harry, if you're feeling fancy!).

Either way, Harry can use Mountbatten-Windsor whenever he wants: part of the Queen's 1960 declaration states that when members of the royal family need a last name (think: official paper work) they can use Mountbatten-Windsor. On top of that, it should be noted that Prince William and Kate Middleton's kids use the last name "Cambridge" at school, which suggests Harry could potentially use "Sussex" as a last name if he wanted to. TBD, friends!

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Mehera Bonner is a celebrity and entertainment news writer who enjoys Bravo and Antiques Roadshow with equal enthusiasm, She was previously entertainment editor at Marie Claire and has covered pop culture for over a decade.Â