ELON Musk and his partner Grimes have revealed the REAL meaning of their baby name ‘X Æ A-12’ – and it looks like it wasn’t a joke.

Grimes, 32, a Canadian singer – whose real name is Claire Boucher – took to Twitter to apparently confirm their newborn would carry the unusual moniker Musk had mentioned.

Musk and Grimes welcomed their infant sonCredit: Twitter

The Canadian singer apparently confirmed he would be called ‘X Æ A-12’ after Musk had joked about itCredit: Twitter

Musk said their baby boy was ‘cute as a button’Credit: Twitter

She tweeted on Tuesday evening: “X, the unknown variable.

“Æ, my elven spelling of Ai (love &/or Artificial intelligence).

“A-12 = precursor to SR-17 (our favorite aircraft). No weapons, no defenses, just speed. Great in battle, but non-violent + (A=Archangel, my favorite song).”

When later asked about how the baby was doing, Musk told one curious fan ‘X Æ A-12’ was “happy, healthy & cute as a button,” followed by a smiley face.

The bizarre name revelation came after the Tesla CEO, 48, posted a cute snap of their sleeping baby using a face tattoo filter, as well as one of him cradling the newborn at the hospital on Twitter.

The South African tech mogul, who has five sons from his previous marriage, could be seen cuddling his infant son, who was swaddled in blankets.

Earlier, Musk had suggested the name X Æ A-12 MuskCredit: Getty – Contributor

Earlier, when Elon’s followers pressed him for a name, he had apparently joked that the newborn is called “X Æ A-12 Musk,” which Grimes seemed to confirm.

The name, which may be pronounced X-Ash-A12, appeared to be partially inspired by one of the songs from her last album – 4ÆM.

Grimes gave birth to their baby on Monday, with Elon announcing that “mom and baby are all good.”

The Canadian native announced she was pregnant back in January with a photo in which a baby appeared to be superimposed on her stomach.

The birth coincides with Musk’s bizarre decision to let go of all his material belongings – bar Gene Wilder’s houseCredit: Twitter

She wrote: “I thought about censoring them [her nipples] for a hot minute haha (this may get taken down anyway) but the photo is so much less feral without the nipples.

“Plus being knocked up is a very feral & war-like state of being. Might as well be what it is.”

It is Grimes’ first child, while Musk already has five children of his own – Nevada, Griffin, Kai, Xavier, Saxon, and Damien.

The birth of their son coincides with Musk announcing in a series of bizarre tweets on Friday he would sell “almost all” of his physical possessions and “will own no house.”

He admitted to his 33 million followers that Grimes is “mad at him” for selling off his stuff while she gives birth to their first child together.

Elon – who has taken a pay cut amid the coronavirus crisis – appeared to send a caveat about the second home to future buyers on Twitter.

“Just one stipulation on sale: I own Gene Wilder’s old house. I cannot be torn down or lose any (sic) its soul,” Musk tweeted.