Conor McGregor's fiancee has given birth to their third child and the name they've chosen is adorable!

The UFC star announced the birth of his newborn son on Instagram, yesterday.

And he's even shared his name...

Of course, since announcing the news, congratulations have been pouring in...

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Now, Conor McGregor is one of the best-known fighters in the world.

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The Irish native's career began in mixed martial arts at the age of twenty and by 2012, McGregor had won both the Featherweight and Lightweight Cage Warrior championships.

But then, things got bigger.

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McGregor vacated both of these titles in 2012 to sign with the UFC. He was equally successful in this sport, achieving the fastest ever knockout in history when he finished Jose Aldo in just thirteen seconds in 2015.

He then made the move to boxing...

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And his professional boxing career began in 2017.

In his debut match, he was defeated by U.S champion Floyd Mayweather - although it was the second most-watched boxing event in history, so that's a win of some sort for McGregor!

It's safe to say, McGregor has quite the career.

But what about his family life?

The MMA champion is engaged to his long-term partner, Dee Devlin...

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With whom he shares 3-year-old son Conor Jr and 2-year-old daughter Croía.

And now, there's a new member of the McGregor clan...

As McGregor's fiancee, Dee, has given birth to their third child, a baby boy.

And they've revealed their his name...


But before we get tell you, first, let me take you through some other questionable baby name choices...

Apple...


Gwyneth Paltrow and Chris Martin also went for a foody option.

Blue Ivy...


You can't expect Beyonce to do things by halves, right?

Birdie...


Busy Phillips took her inspiration from the animal kingdom instead.

Bronx...


Ashlee Simpson and Pete Wentz's kid is so over Brooklyn ...

Monroe...


Mariah Carey clearly wishes stardom on her kids!

Apollo...

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Gwen Stefani thinks her baby is out of this world!

Sunday...


Mike Myers clearly has a favorite day of the week!

Luna...


Chrissy Teigen and John Legend also took inspo from outer space!

North, Saint, Chicago, and Psalm...

We literally can't choose the weirdest of Kimye's baby names.

Stormi...

Kylie Jenner's kid did give us one of the most iconic memes of the year, though.

Lazer...


Well, you didn't expect Diplo to go for a conventional name, did you?

Bear...


Kate Winslet clearly wanted a baby to cuddle with.

Everest...


George Lucas went for a pretty epic-sounding name.

Denim...


Toni Braxton paid tribute to everyone's favorite pants material.

Usher...


Yep, Usher's son is also called Usher. Good lord.

Dream...


Rob Kardashian & Blac Chyna's baby is certainly dreamier than their current relationship status.

Maple...


Jason Bateman is clearly a big syrup fan.

Puma...


Erykah Badu was obviously never going to go for a common name.

Bluebell...


Geri Halliwell (aka Ginger Spice) took the floral name theme to the next level.

Dusty Rose...


Dusty? Are you sure, Adam Levine?

Sparrow...


Nicole Richie went for the least glamorous of birds.

Blanket...


Michael Jackson's very offbeat choice here.

Satchel...


Spike Lee went with a more practical name.

True...


Khloe Kardashian and Tristan Thompson's baby name is kind of sadly ironic.

Ace...


Jessica Simpson clearly thought her kid was a winner.

Rocket...


Sam Worthington went more "out of this world" with his choice.

Ode Mountain...


Jena Malone is clearly a poetry and nature fan.

Rainbow...


Holly Madison's choice is very kitschy - and colorful.

Pilot Inspektor...


Really not sure what Jason Lee was going for here.

Hart...


Miranda Kerr feeling all romantic ...

Sailor...


A pretty cute name for Liv Tyler's offspring.

Briar Rose...


Rachel Bilson and Hayden Christensen are obviously fans of Sleeping Beauty.

Willow...


Pink opted for another "natural" name ...

Brooklyn...


Was David and Victoria Beckham's kid named after the place he was conceived?

Peaches...


Bob Geldof actually went off-piste with all his kids' names - from Fifi Trixabelle to Pixie.

Homer...


Richard Gere was apparently inspired by a family name - but we know your mind just goes to the Simpsons...

Frances Bean...


Kurt Cobain and Courtney Love's child is named after the least glamorous food.

Sunny...


Adam Sandler's baby name brings positivity - or at least, he hopes so!

So what have McGregor and his fiancée, Dee called their son...

Introducing baby Rían McGregor!

The doting dad posted this adorable picture on his Instagram with the caption:

"The McGregor Clan is now a family of 5. Healthy baby boy delivered! Baby and Mammy Wonder Woman are doing great! God I thank you for everything you give to me and my family in this world. My new born son, Rían McGregor."

Congratulations to the McGregor family!