Chronology of Elon Musk’s children: A look at billionaire’s expanding family

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Elon Musk, the billionaire entrepreneur known for his ventures in Tesla, SpaceX, and X (formerly Twitter), has also made headlines for his growing family. With multiple partners and a personal philosophy that embraces a high birth rate, Musk has fathered 14 known children as of 2025. Here’s a comprehensive timeline of his offspring and the relationships that shaped his family.

Nevada Alexander Musk (2002)

Musk’s first child, Nevada Alexander Musk, was born in 2002 with his first wife, Justine Musk (née Wilson). Tragically, Nevada passed away at just 10 weeks old due to sudden infant death syndrome (SIDS). This loss deeply affected Musk and Justine, influencing their later decisions about expanding their family.

Twins: Griffin and Vivian Jenna Wilson (2004)

Determined to continue growing their family, Musk and Justine turned to IVF. In April 2004, they welcomed twins—Griffin and Xavier Musk. However, in 2022, Xavier legally changed her name to Vivian Jenna Wilson, distancing herself from Musk and taking her mother’s surname. She also declared she no longer wished to be related to her father “in any way.”

Triplets: Kai, Saxon, and Damian Musk (2006)

Two years later, in January 2006, Musk and Justine again used IVF to conceive triplets—Kai, Saxon, and Damian. The couple co-parented their children following their divorce in 2008.

X Æ A-12 (X AE A-Xii) Musk (2020)

After Musk’s marriage to Talulah Riley ended for the second time in 2016, he began dating musician Claire Boucher, better known as Grimes. In May 2020, the couple welcomed a son, initially named X Æ A-12. However, due to California naming laws, they modified it to X AE A-Xii Musk, often referred to simply as “X.”

Exa Dark Sideræl Musk (2021)

In December 2021, Musk and Grimes welcomed their second child, a daughter named Exa Dark Sideræl Musk, via surrogate. She is affectionately called “Y.” This birth was kept secret until March 2022, when Grimes revealed her existence in an interview.

Twins with Shivon Zilis (2021)

Around the same time Grimes was expecting Exa, Musk quietly fathered twins with Shivon Zilis, a high-ranking executive at his company Neuralink. The twins, Strider and Azure Musk, were born in November 2021. The news surfaced in July 2022 after court documents revealed that Musk and Zilis had petitioned to give the children his last name.

Techno Mechanicus Musk (2022)

In September 2023, it was revealed that Musk and Grimes had secretly welcomed a third child, a son named Techno Mechanicus, nicknamed “Tau.” Little is known about the child, as Musk and Grimes kept his birth entirely private until a biography on Musk by Walter Isaacson disclosed his existence.

Arcadia Musk (2024)

Earlier in 2024, Musk and Neuralink executive Shivon Zilis welcomed a child named Arcadia. Responding to reports that he had “secretly fathered” the baby, Musk pushed back, telling Page Six, “All our friends and family know. Failure to issue a press release, which would be bizarre, does not mean ‘secret.’” The child’s sex was not disclosed at the time.

RSC Musk (2024)

In February 2025, conservative author Ashley St. Clair took to X (formerly Twitter) to allege that she and Musk had a child together “a few months ago.” This marked Musk’s 13th child.

Seldon Lycurgus (2025)

Most recently, Zilis confirmed the birth of another child with Musk, a son named Seldon Lycurgus. “Discussed with Elon and, in light of beautiful Arcadia’s birthday, we felt it was better to also just share directly about our wonderful and incredible son,” she announced. However, no details were provided on when he was born.

Family dynamics and Musk’s views on parenthood

Elon Musk has openly expressed his belief that declining birth rates pose a threat to civilization. He frequently promotes the idea of large families and has indicated that he takes an active role in raising his children, despite his demanding career. However, his relationship with some of his children, particularly Vivian Jenna Wilson, remains strained.

Grimes has spoken publicly about co-parenting challenges, hinting at tensions following her split from Musk. Meanwhile, Shivon Zilis has defended Musk as a father, calling him “dedicated” and praising his involvement with their children.

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