Elon Musk talks a lot about the "underpopulation crisis." He doesn't just tweet about it, though—he’s clearly living it. Keeping track of the elon musk children ages has become a bit of a full-time job for internet sleuths, mostly because the man keeps adding to the roster faster than SpaceX launches rockets.
Right now, in early 2026, the count stands at 14.
Yeah, 14. That’s enough for two full basketball teams and a couple of referees. Honestly, it’s a lot to process. Between the names that look like WiFi passwords and the secret births that only come to light months later in biographies or court filings, the Musk family tree is less of a tree and more of a complex, sprawling vine.
You’ve got the older kids who are already entering adulthood and then a whole "second wave" of toddlers and infants with names inspired by sci-fi, video games, and high-level math. It’s a wild mix.
The First Generation: Justine Wilson’s Kids
Elon’s first marriage was to Canadian author Justine Wilson. They were together during the early Zip2 and PayPal days. This era of his life was marked by both immense tragedy and the birth of five children who are now basically grown-ups.
Tragically, their first son, Nevada Alexander, passed away in 2002 from SIDS when he was only 10 weeks old. It’s a piece of history that adds a lot of weight to why Elon is so obsessive about legacy and birth rates.
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After Nevada, the couple turned to IVF.
- Griffin Musk (21): Born April 15, 2004. He’s the oldest now. He mostly stays out of the limelight, which is probably a smart move when your dad is the richest man on Earth.
- Vivian Jenna Wilson (21): Griffin’s twin. You might remember the headlines back in 2022 when she legally changed her name and dropped the "Musk" surname entirely. She’s been very public about not wanting to be associated with her biological father.
- The Triplets (20): Kai, Saxon, and Damian Musk were born in January 2006. As of right now, they’ve just hit that 20-year milestone. Like their older brother, they aren’t exactly posting TikTok dances or seeking the spotlight. They grew up going to Ad Astra, the experimental school Elon built specifically because he didn't like how traditional schools worked.
The Grimes Era: X, Y, and Tau
Then things started getting "Musk-y." When Elon started dating the musician Grimes (Claire Boucher), the naming conventions shifted from traditional to... well, let's call it "futuristic."
X Æ A-Xii (affectionately just called "X") was born on May 4, 2020. He’s 5 years old now. You’ve probably seen him on his dad’s shoulders at Tesla events or even at the White House. He’s the most visible of all the kids.
Then came Exa Dark Sideræl Musk, nicknamed "Y." She was born via surrogate in December 2021, making her 4 years old. The name "Exa" comes from the supercomputing term exaFLOPS. Sideræl is a "more elven" spelling of sidereal, which is about star time. Very on-brand for a guy trying to colonize Mars.
The third child with Grimes was a surprise to almost everyone. Techno Mechanicus, or "Tau," was only revealed to the world in Walter Isaacson’s 2023 biography. He was born sometime in 2023, so he’s likely around 2 or 3 years old now.
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The Neuralink Connection: Shivon Zilis
While the world was watching the drama with Grimes, Elon was also fathering children with Shivon Zilis, an executive at his company, Neuralink. This part of the family tree is particularly dense.
- Strider Sekhar Sirius and Azure Astra Alice are twins born in November 2021. They are 4 years old. Strider is apparently named after Aragorn from Lord of the Rings and the physicist Subrahmanyan Chandrasekhar.
- Arcadia Musk arrived in February 2024. She’s 2 years old.
- Seldon Lycurgus is the latest with Shivon, born late 2024 or early 2025. He’s roughly a year old. The name Seldon is a direct nod to Hari Seldon from Isaac Asimov’s Foundation series.
The Newest Additions and the 2026 Drama
It doesn't stop there. In early 2025, it came out that Elon had a son with conservative influencer Ashley St. Clair. That child, Romulus Musk, was born around September 2024.
He’s just over a year old now.
However, things have turned messy. As of January 2026, Elon is reportedly in a legal battle with St. Clair over custody. He’s publicly cited concerns about her changing views on gender identity—something he’s been notoriously vocal about since his estrangement from Vivian.
There’s also that unconfirmed report from mid-2025 about a child with a Japanese pop star. If true, that would bring the count to 15, but until there’s a birth certificate or a tweet from the man himself, we’re sticking with the 14 we can name.
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Why the Elon Musk Children Ages Matter
It’s easy to look at this and just see a weird celebrity gossip story. But for Elon, this is a "walk the walk" situation. He believes that "smart people" have a moral obligation to procreate to save civilization. He’s essentially trying to build a dynasty of high-IQ heirs who might one day run X, SpaceX, or a colony on another planet.
It’s a massive experiment in genetics and upbringing.
Most of the younger kids are being raised in a very unconventional environment—shuttled between Texas and California, often appearing in the background of high-stakes business meetings.
Quick Reference: The Current Ages (As of Jan 2026)
- Griffin & Vivian: 21 years old
- Kai, Saxon, & Damian: 20 years old
- X Æ A-Xii: 5 years old
- Exa Dark Sideræl (Y): 4 years old
- Strider & Azure: 4 years old
- Techno Mechanicus (Tau): ~2-3 years old
- Arcadia: 2 years old
- Romulus: 1 year old
- Seldon Lycurgus: ~1 year old
If you're trying to keep up with the Musk family, the best thing to do is look at court filings in Travis County, Texas. That's usually where the news breaks first.
One thing is certain: with Elon's track record, this list probably isn't finished. Whether he's aiming for a round 20 or just letting the "woke mind virus" battle dictate his family planning, the Musk household is only going to get more crowded.
Keep an eye on his X (formerly Twitter) feed for the inevitable "me and my sons" photo ops, which usually precede a new birth announcement or a custody filing. That's basically the modern-day version of a Royal Decree.