Elon Musk thinks the world is running out of people. Honestly, he’s doing his best to solve that problem single-handedly. As of early 2026, the tech mogul has fathered 14 children with four different women. It’s a lot to keep track of, especially when you consider the names range from "classic university student" to "encrypted server password."
You've probably seen the headlines about "X" or "Tau," but the full list is a wild ride through Silicon Valley futurism, tragic loss, and very public family feuds.
The Early Years: Justine Wilson and the First Six
Long before SpaceX was landing rockets or X (the app) existed, Elon was married to Canadian author Justine Wilson. Their journey into parenthood started with a heartbreak that most people don't talk about. In 2002, their first son, Nevada Alexander Musk, was born. Tragically, he passed away at just 10 weeks old from Sudden Infant Death Syndrome (SIDS).
After that loss, the couple turned to IVF. It worked—twice.
First came the twins in 2004: Griffin Musk and Vivian Jenna Wilson. Vivian is one of the few Musk children who has made major headlines as an adult. In 2022, she legally changed her name and gender, explicitly stating she no longer wanted to be related to her biological father. She uses her mother’s maiden name now.
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Then, in 2006, the triplets arrived. Kai, Saxon, and Damian Musk.
These three have stayed mostly out of the spotlight. Damian, interestingly, reportedly became a vegetarian at age eight specifically to lower his carbon footprint. Talk about being on-brand for a Tesla household.
The Grimes Era: When Names Got "Experimental"
Things got weird—or "visionary," depending on who you ask—when Musk started dating the musician Grimes (Claire Boucher). This is where the elon musks childrens names searches usually start because, frankly, nobody knew how to pronounce them.
X Æ A-Xii (nicknamed "X") was born in May 2020.
The internet nearly broke trying to decode it. Basically, the "X" is the unknown variable. "Æ" is an elven spelling of AI. "A-12" refers to the Lockheed A-12 spy plane. They had to change the original "12" to Roman numerals ("Xii") to comply with California law because the state doesn't allow numbers on birth certificates.
Then came the "secret" babies.
Exa Dark Sideræl Musk (nicknamed "Y") was born via surrogate in December 2021. "Exa" refers to exaFLOPS (supercomputing power). "Sideræl" is a more elven way of saying sidereal, which is basically "star time."
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A third child with Grimes, Techno Mechanicus (nicknamed "Tau"), was revealed in Walter Isaacson’s 2023 biography. Tau is a mathematical constant representing $2\pi$. Grimes once described him as a "little Spock."
The Zilis Expansion: 2021 to 2025
While the world was focused on Grimes, Musk was also having children with Shivon Zilis, an executive at his brain-chip company, Neuralink. This part of the family tree grew fast.
In November 2021, just weeks before Grimes’ daughter was born, Zilis gave birth to twins: Strider Sekhar Sirius and Azure Astra Alice.
Strider is a nod to adventure (and maybe Lord of the Rings?), while Azure refers to the blue sky.
The growth didn't stop there.
In February 2024, they welcomed a daughter named Arcadia Musk.
Exactly one year later, on February 28, 2025, Zilis announced the birth of their fourth child together, a son named Seldon Lycurgus.
Seldon is almost certainly a reference to Hari Seldon from Isaac Asimov’s Foundation series—a series Musk has cited as a massive influence on his life's work.
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The Newest Addition: Romulus Musk
The 14th child arrived via conservative influencer Ashley St. Clair.
Born in the fall of 2024, the boy is named Romulus Musk.
The name pulls from Roman mythology—one of the legendary founders of Rome. St. Clair confirmed the birth in early 2025, though she has been vocal on X about Musk’s lack of involvement in the child's daily life, even calling him a "petulant man-child" during custody discussions.
Why These Names Actually Matter
Musk isn't just picking names out of a hat. He's obsessed with the future of consciousness and the survival of the human race. When you look at the list of elon musks childrens names, you see a pattern:
- Computing & Math: Exa, Techno, Tau.
- Space & Stars: Sideræl, Azure, Sirius.
- Mythology & History: Griffin, Arcadia, Romulus, Lycurgus.
- Sci-Fi: Seldon.
It’s a legacy built on the things he spends his billions on.
What Most People Get Wrong
The biggest misconception is that these are all "joke" names. To Musk and the mothers of these children, they are markers of a specific philosophy. They view their children as the next generation of "multi-planetary" humans. Whether the kids actually enjoy having to explain their names to a barista in twenty years is another story entirely.
Actionable Takeaway for Your Own Research
If you’re trying to keep up with this ever-evolving family tree, don't just look at celebrity tabloids. Most of the "surprise" reveals have actually come from:
- SEC filings and court documents (for name changes).
- Authorized biographies (like Walter Isaacson’s).
- Direct posts on X (Musk and Zilis often confirm births there months after the fact).
The best way to track the timeline is by the mother, as the births often overlap. As of right now, the count stands at 14, but given Musk's "pronatalist" stance, that number is rarely static for long.