Finding out you have a new brother or sister isn't usually something you do while scrolling through Reddit. But for Vivian Jenna Wilson, that's basically been the norm for the last few years. Honestly, the family tree surrounding the 21-year-old daughter of Elon Musk and Justine Wilson is so tangled it’s starting to look more like a forest.
Vivian has been incredibly open about the fact that she’s estranged from her father. She’s famously said she doesn’t want to be related to him in "any way, shape or form." But while she’s cut ties with the billionaire, she still shares a biological connection with a massive group of siblings. As of early 2026, the count for Vivian Jenna Wilson siblings stands at 13—though if you ask Vivian herself, she might tell you she’s lost track.
The Core Five: The "Original" Siblings
Before things got complicated with the Neuralink executives and pop stars, there was the original group. These are Vivian’s full siblings from Elon’s marriage to author Justine Wilson.
Most people don't realize that Vivian was actually part of a set of twins. Her twin brother, Griffin, was born in April 2004. While Vivian has become a public figure due to her transition and her vocal criticism of her father, Griffin has stayed almost entirely out of the spotlight. They were followed in 2006 by a set of triplets: Kai, Saxon, and Damian.
These four guys are the siblings Vivian actually grew up with. They share the same history, the same IVF journey their parents went through, and the same quiet life in the shadow of their father's massive ego. Damian is often cited as a bit of a prodigy—a classical music whiz who apparently decided to go vegetarian at age eight to help the planet.
✨ Don't miss: Ainsley Earhardt in Bikini: Why Fans Are Actually Searching for It
- Griffin Musk: The twin brother. Quiet, private, and 21 years old.
- Kai, Saxon, and Damian: The 20-year-old triplets.
It’s a tight-knit group, or at least it used to be. But then the family expanded in ways nobody—including Vivian—really saw coming.
The Half-Siblings She Found Out About Online
This is where it gets weird. Vivian famously posted on Threads about how she’s found out about new half-siblings through social media "six separate times." Can you imagine? You’re just hanging out, and suddenly a subreddit tells you that you have a new brother named Techno Mechanicus.
The most famous of these half-siblings are the kids Elon had with the singer Grimes.
- X Æ A-12 (known as X): Born in 2020.
- Exa Dark Sideræl (known as Y): Born via surrogate in 2021.
- Techno Mechanicus (known as Tau): Whose existence wasn't even public until a biography came out.
Vivian has admitted she’s only met X once. There isn't really a "big sister" vibe going on there. It's more like they are strangers who happen to share 50% of the same DNA.
🔗 Read more: Why the Jordan Is My Lawyer Bikini Still Breaks the Internet
The Neuralink Connection
Then there are the children with Shivon Zilis, an executive at Musk's company, Neuralink. This part of the family tree is particularly dense. There are the twins, Strider and Azure, born in 2021 (just weeks before Exa was born, which... yikes). Since then, more children have been added to that branch, including a daughter named Arcadia and a son named Seldon Lycurgus.
By the time you finish reading this, there might be another one. In early 2025, influencer Ashley St. Clair also claimed to have a child with Musk, adding Romulus to the list of names Vivian has to remember.
Why the Distance Matters
You’ve gotta feel for her. Vivian has been very clear that she views her father’s "pro-natalist" obsession as a bit of a performance. She’s called him a "pathetic man-child" and has been a fierce advocate for trans rights, especially after her father made comments saying she was "killed by the woke mind virus."
For Vivian, being part of the Vivian Jenna Wilson siblings group isn't about being part of a dynasty. It’s a biological fact she’s forced to navigate while trying to build her own identity in Tokyo, where she’s been studying.
💡 You might also like: Pat Lalama Journalist Age: Why Experience Still Rules the Newsroom
She doesn’t talk to her dad. She doesn’t really talk to the "new" side of the family. She’s basically carved out her own life with her mother, Justine, and her core group of brothers. It’s a chosen family situation, even if the world keeps trying to link her back to the "Musk-eteers."
What We Can Learn From the Wilson-Musk Dynamic
If you're looking at this from the outside, the takeaway is pretty simple: DNA doesn't make a family; showing up does. Vivian’s story is a reminder that even in the wealthiest families on Earth, the basics of respect and communication are what actually hold people together.
Next steps for you:
If you're following this family saga, keep an eye on Vivian's own social media presence on platforms like Threads. She’s become a significant voice for the trans community and often provides the most "real" updates on the family dynamic, far away from the curated PR of her father's companies. You might also want to read Justine Wilson's essays; they provide a lot of context on why the family ended up so fractured in the first place.