When you’re the richest man in the world, people expect you to do things a little differently. You launch rockets. You buy social media platforms on a whim. And apparently, you pick baby names that look like a WiFi password or a top-secret government project. If you've ever found yourself wondering what is elon musk's son's name, you aren't alone. Honestly, it depends on which son you are talking about.
Elon has fathered 14 children as of early 2026. The most famous one—the one that broke the internet—is the son he shares with the musician Grimes. But the "official" answer to the name question is actually a bit of a moving target.
The Son Who Broke the Internet: X Æ A-12
In May 2020, Elon and Grimes (Claire Boucher) welcomed a baby boy. They announced his name as X Æ A-12. People thought it was a joke. It wasn't.
Basically, the name is a math equation and a tribute to a plane. Grimes broke it down on Twitter at the time. The "X" represents the unknown variable. The "Æ" is her "elven" spelling of AI (Artificial Intelligence). The "A-12" refers to the Archangel 12, which was the precursor to the SR-71 Blackbird, Elon’s favorite aircraft.
But California laws are pretty strict. You can't just put symbols and numbers on a birth certificate. The state requires names to use the 26 letters of the English alphabet. Because of that, they had to tweak it. The legal name was changed to X Æ A-Xii. They just swapped the "12" for Roman numerals.
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How do you even say that? Elon told Joe Rogan it’s just "X," then the "Æ" is pronounced like "Ash," and then "A-12." So, X-Ash-A-Twelve. Simple, right? Kinda. Most of the time, they just call him X.
The Other Sons You Might Not Know About
Elon's family tree is massive. Before the Grimes era, he had a whole family with his first wife, Justine Wilson. They went through a lot. Their first son, Nevada Alexander, tragically died of SIDS at just 10 weeks old in 2002. It’s a piece of his history that doesn’t get mentioned as much in the memes, but it clearly shaped him.
After that loss, Elon and Justine used IVF to have five more sons:
- Griffin (Twin)
- Vivian Jenna Wilson (Born Xavier; changed her name and severed ties with Elon in 2022)
- Kai (Triplet)
- Saxon (Triplet)
- Damian (Triplet)
These older boys are mostly in their late teens or early twenties now. They’ve managed to stay relatively out of the spotlight compared to their younger siblings.
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The Newest Additions: 2024 and 2025
Things got even more complicated recently. We found out about more children through Walter Isaacson’s biography and social media slips.
Grimes and Elon actually have a third child together, a son named Techno Mechanicus, who goes by the nickname Tau. Then there are the children he shares with Neuralink executive Shivon Zilis. For a long time, the public only knew about their twins, Strider and Azure. But in 2024, they had a daughter named Arcadia, and in 2025, they welcomed another son named Seldon Lycurgus.
Then there is Romulus. This son was born in late 2024 to author Ashley St. Clair. The news didn't really hit the mainstream until early 2025 when a paternity test was confirmed during a legal dispute.
Why the Names Are So Strange
It’s easy to roll your eyes at names like "Techno Mechanicus" or "X Æ A-Xii," but there is a logic to it—at least in Elon’s world. He is obsessed with the future, AI, and the idea of humans becoming a multi-planetary species. To him, these aren't just names; they’re symbols of a new era.
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He’s also very vocal about underpopulation. He thinks the biggest threat to civilization is the declining birth rate. That’s why he’s having so many kids. He’s essentially trying to "lead by example," even if his personal life looks like a complex puzzle to the rest of us.
Quick Cheat Sheet of the Sons:
- Nevada Alexander (Deceased)
- Griffin (First living son)
- Kai, Saxon, Damian (The triplets)
- X Æ A-Xii (The most famous son with Grimes)
- Techno Mechanicus (Tau) (The "secret" son with Grimes)
- Strider (Son with Shivon Zilis)
- Seldon Lycurgus (Youngest son with Shivon Zilis)
- Romulus (Son with Ashley St. Clair)
What to Keep in Mind
If you're trying to keep track of this in real-time, good luck. The "official" count often changes as more information leaks or legal documents surface. The best way to stay updated is to look at court filings in Texas (where he lives) or wait for the next authorized biography.
If you are looking for the "X" kid, remember that his legal name on paper is actually X AE A-XII Musk because California wouldn't allow the special character.
To stay informed on high-profile celebrity family news, always cross-reference social media announcements with reputable news outlets like People or The Guardian, as fake rumors about Elon's family are incredibly common on platforms like X.