Elon Musk has explained how to pronounce his new son's name, X Æ A-12.
Just a few days after his partner Grimes gave birth to their child, the Tesla boss appeared once again on The Joe Rogan Experience for a chat.
And it didn't take long for Joe to get to the bizarre name and how people are supposed to say it.
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Jumping straight to it, the presenter asked: "How do you say the name? Is it a placeholder?"
Musk replied: "First of all, my partner is the one who, mostly, actually came up with the name. I mean it's just X, the letter X. And then the Æ is, like, pronounced 'ash'... yeah... and then A-12 is my contribution."
The 48-year-old said the A-12 is the final plane in the Archangel series, a CIA operation that created a fleet of reconnaissance aircraft. The programme eventually created the SR-71, which Musk says is the coolest plane ever.
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Musk and Grimes welcomed X Æ A-12 into the world last week, sharing a strange photo on social media.
The Tech whizz had tweeted the news shortly after the birth, saying simply: "Mom & baby all good."
But after numerous followers asked for a pic of his newborn, he eventually gave in, though not without adding a few, er, tattoos to the infant's face using a filter.
He also shared another, slightly more orthodox, photo, in which he holds his newborn son while clutching a facemask in the other hand.
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Musk hit the headlines once again over the past few days after a Twitter outburst caused $13bn to be wiped off Tesla's value. Yikes.
On the podcast, Rogan also asked his guest about a huge claim he recently made on Twitter, in which he pledged to sell 'almost all physical possessions', including his houses - one of which used to belong to actor Gene Wilder.
Musk, 48, explained: "I'm slightly sad about it actually, but I think possessions kind of weigh you down. They're kind of an attack vector. People say 'Hey billionaire, you got all this stuff!' Now it's like, 'Well, now I don't have stuff. What are you gonna do?'"
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Rogan asked if the entrepreneur was going to rent a place - prompting Musk to confirm he is - and if that meant getting rid of 'everything except clothes'.
"No I said like, almost everything," Musk said quickly, laughing along to Rogan's suggestion that he keeps a 'couple of Teslas'.
"Yeah, I kinda have to - test the product and stuff!" Musk said. "Yeah, things that have sentimental value, for sure I'm keeping those.
"What's the worst that could happen? It'll be fine."
Featured Image Credit: Elon Musk/TwitterTopics: Interesting, US News, US Entertainment