All About Elon Musk’s Kids: Meet His 14 Children and Their 4 Moms

Key Points

• Elon Musk has welcomed 14 children with four different women since 2002.

• His firstborn son tragically passed away at just 10 weeks old in 2002.

• Musk has since fathered children with Justine Wilson, Grimes, Shivon Zilis, and Ashley St. Clair.

Elon Musk’s foray into fatherhood has provided him with a total of 14 kids (and counting) over the past two and a half decades: Nevada, Vivian, Griffin, Kai, Saxon, Damian, X Æ A-Xii, Exa, Strider, Azure, Techno, Arcadia, Seldon Lycurgus, and Romulus. The tech billionaire, who currently heads up X, Tesla, and SpaceX, welcomed his first child in 2002 and his youngest one sometime in late 2024 or early 2025. One of his daughters, however, has a hard time keeping track of just how many kids are in the mix.

“I will say I do not actually know how many siblings I have, if you include half-siblings,” Vivian Jenna Wilson told Teen Vogue, adding that she is on “good terms” with those she does know, despite having a strained relationship with her father.

Musk’s most recent child was born to conservative influencer Ashley St. Clair, who sued for sole custody after battling it out with the billionaire on his social media platform X. The mom of two called Musk a “petulant man-child” who “has met [Romulus] only three (3) times and has had no involvement in his care and upbringing.”

Musk is a prominent pronatalist who has voiced concerns over falling birth rates, going so far as to claim that “If people don’t have more children, civilization is going to crumble.” Ahead, everything you should know about his 14 kids.

Nevada Alexander

Musk’s firstborn son tragically passed away at just 10 weeks old from Sudden Infant Death Syndrome in 2002. His then-wife Justin Wilson later penned an essay in Marie Claire describing the incident.

“Nevada went down for a nap, placed on his back as always, and stopped breathing,” she wrote. “By the time the paramedics resuscitated him, he had been deprived of oxygen for so long that he was brain-dead.”

She continued, “He spent three days on life support in a hospital in Orange County before we made the decision to take him off it. I held him in my arms when he died.”

Vivian Jenna Wilson and Griffin

Musk’s second eldest arrived after the couple underwent IVF treatment just a few months after Nevada’s death. “I buried my feelings,” Wilson wrote in the same Marie Claire essay. “Elon and I planned to get pregnant again as swiftly as possible. Within the next five years, I gave birth to twins, then triplets.”

That first set of twins, of course, was Vivian and Griffin. The duo were born on April 15, 2004. Vivian went on to legally change her name and gender in a court filing 18 years later, in April 2022. Her petition included the following explanation: “Gender Identity and the fact that I no longer live with or wish to be related to my biological father in any way, shape or form,” per People. Vivian has also spoken out about her relationship with her father on threads, writing, “You single-handedly disillusioned me with how gullible we are as a species because somehow people keep believing you for reasons that continue to evade me.”

Musk spoke to the Financial Times about their relationship, saying, “It’s full-on communism…and a general sentiment that if you’re rich, you’re evil…It may change, but I have very good relationships with all the others [children]. Can’t win them all.”

Griffin, for his part, has largely avoided the spotlight.

Kai, Saxon, and Damian

Two years after giving birth to twins, Musk and Wilson announced the arrival of their triplets: Kai, Saxon, and Damian. The trio were born in 2006. Neither parent has discussed them in public, however a 2023 biography of the Tesla founder, simply titled Elon Musk, did reveal that Damian became a vegetarian at the age of 8 to “decrease [his] carbon footprint.”

Following the arrival of their triplets, Musk and Wilson ended their marriage by filing for divorce in 2008.

X Æ A-Xii

X Æ A-Xii, originally named X Æ A-12, was born on May 4, 2020 to Musk and his then-partner Grimes. For obvious reasons, the name (and how to pronounce it) immediately confused fans of the couple.

“So, it’s just X, the letter X, and then the Æ is pronounced Ash,” Musk said during an appearance on The Joe Rogan Experience. Grimes, however, told fans on Instagram that”It’s just X, like the letter X. Then A.I. Like how you said the letter A then I.”

To make matters all the more confusing, Musk purchased Twitter in 2022 and renamed it X. The SpaceX founder apparently brought his son to the X offices and later to the White House in his role leading DOGE. X Æ A-Xii also joined his dad at the MMA Global Possible Conference in Miami, Florida in 2023.

Like his father, X Æ A-Xii loves all things outer space. “X knows a lot about rockets. It’s crazy,” Grimes once told Wired. “He knows more about rockets than me.” The singer added that when SpaceX’s Starship rocket exploded in April 2023, the toddler was distraught. “He had, like, a three-day PTSD meltdown,” she recalled. “Every hour, he was waking up and going, ‘Starship …’ and I had to rub his back.”

Strider and Azure

A few months after X Æ A-Xii’s arrival, Musk secretly welcomed twins with former Tesla employee Shivon Zilis, People reports. Strider and Azure were born in Austin, Texas in November 2021; their birth was not publicly announced until the following summer. To complicate matters further, Grimes’s second child with Musk arrived just a few weeks after Zilis gave birth.

Zilis later defended the father of her children on his social media platform X. “No one’s perfect but I’ve never met anyone who goes through more personal pain to fight for an inspiring future for humanity—and has done so tirelessly for decades,” Zilis wrote. “Everyone’s entitled to their opinion but mine is that there’s no one I respect and admire more.”

In April 2022, the couple filed a petition to change the children’s names so that they would “have their father’s last name and contain their mother’s last name as part of their middle name,” according to People. Their names were later revealed in September 2023, an an excerpt of Walter Isaacson’s biography of Musk published in Time.

Exa Dark Sideræl

Grimes and Musk welcomed a second child via surrogate mere weeks after Strider and Azure were born. Exa Dark Sideræl was born in December 2021. Her arrival was kept secret until March 2022, when, during an interview with Vanity Fair at Grimes’s home, Exa, who was in another room, began crying. Grimes later explained the meaning behind the name in the same interview. In short: Exa is a supercomputing term; Dark references “the unknown;” Sideræl is “a more elven” spelling of sidereal, a.k.a. “the true time of the universe, star time, deep space time, not our relative earth time.”

“People fear [the unknown] but truly it’s the absence of photons,” Grimes told the publication. “Dark matter is the beautiful mystery of our universe.”

As far as nicknames go? Grimes told X followers, “She’s Y now, or ‘Why?’ or just ‘?’ (But the government won’t recognize that). curiosity, the eternal question, .. and such.” The singer has also characterized her daughter as “a little engineer,” adding, “she likes industrial shipping. She’s very strange.”

Techno Mechanicus

Grimes and Musk secretly welcomed a third child, Techno Mechanicus, who also goes by Tau, in June 2022. News of their his arrival broke thanks to Walter Isaacson’s Elon Musk biography, released in September 2023.

“Tau is so amazing. He came out with eyes that could just see so deeply into your soul, with so much knowledge. He looks like a little Spock. He’s definitely a Vulcan,” Grimes told the author, as quoted in the book.

Following the book’s release, the singer later mentioned her son briefly on X. “I wish I could show u how cute little Techno is but my priority rn is keeping my babies out of the public eye,” she wrote. “Plz respect that at this time.”

Arcadia

Zilis gave birth to her and Musk’s third child, Arcadia, on February 28, 2024.

One year later, Zilis took to X to celebrate her baby’s birthday. “Happy 1st birthday, darling Arcadia,” she wrote. “Mommy loves you with all her heart.”

Seldon Lycurgus

A fourth child joined the Musk-Zilis clan sometime in late 2024/early 2025. The couple did not reveal the baby’s birthdate, but did confirm his arrival in February ’25 via X. “Discussed with Elon, we felt it was better to share directly about our wonderful and incredible son Seldon Lycurgus,” the mom-of-four wrote. “Built like a juggernaut, with a solid heart of gold. Love him so much.”

Romulus

Musk’s 14th child was born to conservative influencer Ashley St. Clair at some point in the fall of 2024. The author named her son Romulus and made the surprise announcement on Musk’s own platform, X.

“Five months ago, I welcomed a new baby into the world,” she wrote. “Elon Musk is the father. I have not previously disclosed this to protect our child’s privacy and safety, but in recent days it has become clear that tabloid media intends to do so, regardless of the harm it will cause.”

She continued, “I intend to allow our child to grow in a normal and safe environment. For that reason, I ask that the media honor our child’s privacy, and refrain from invasive reporting.”

Following St. Clair’s post, relations quickly deteriorated between her and Musk. The Tesla founder responded with his own tweet: “I don’t know if the child is mine or not, but am not against finding out. No court order is needed.” He also claimed to have sent her a massive sum of money, however St. Clair retorted that the money had been withdrawn in an act of financial retaliation.

“You weren’t sending *me* money, you were sending support for your child that you thought was necessary… until you withdrew most of it to maintain control and punish me for disobedience,” she wrote. “But you’re really only punishing your son.”

St. Clair then signed off by calling Musk a “petulant man-child.” The Wall Street Journal later confirmed that Musk’s “probability of paternity” was 99.9999%, according to a report from Labcorp. The mom-of-two has since filed a petition for sole custody with the New York Supreme Court, claiming Musk “has met [Romulus] only three (3) times and has had no involvement in his care and upbringing.”

Read the original article on InStyle