The Full List Of Elon Musk’s 14 Children: Names, Mothers, And The Bizarre Meanings Behind X, Y, And Seldon Lycurgus

The world's most talked-about billionaire, Elon Musk, continues to make headlines not just with his ventures like Tesla and SpaceX, but with his ever-growing and uniquely named family. As of this current date in December 2025, the total count of his children is a subject of intense public and media scrutiny, with recent reports suggesting a staggering 14 children from four different mothers, adding a layer of complexity and curiosity to his personal life. This comprehensive article delves into the full roster of his offspring, from the tragic loss of his firstborn to the ultra-futuristic names of his latest additions.

The fascination surrounding the tech mogul's family is driven by the sheer number of children and the often-bizarre, code-like names he and his partners choose, which seem to reflect his passion for science fiction, technology, and the future of humanity. We break down the complete list of names, the mothers, and the intriguing biographical details that define the next generation of the Musk dynasty, including the most recent and unverified claims that have surfaced in 2025.

Elon Musk's Complete Family Tree: A Biographical List of His Children

Elon Musk has fathered children with three known partners: Canadian author Justine Wilson, musician Grimes (Claire Elise Boucher), and Neuralink executive Shivon Zilis. A fourth, unverified claim has recently emerged in 2025. Here is the detailed, chronological list of his children, their names, and their mothers.

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• Nevada Alexander Musk
  • Mother: Justine Wilson
  • Born: 2002
  • Status: Tragically passed away from Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
• Griffin Musk (Twin)
  • Mother: Justine Wilson
  • Born: 2004 (via IVF)
• Vivian Jenna Musk (Twin)
  • Mother: Justine Wilson
  • Born: 2004 (via IVF)
  • Note: Vivian legally changed her name in 2022, adopting her mother's maiden name and stating she no longer wishes to be related to her biological father.
• Kai Musk (Triplet)
  • Mother: Justine Wilson
  • Born: 2006 (via IVF)
• Saxon Musk (Triplet)
  • Mother: Justine Wilson
  • Born: 2006 (via IVF)
• Damian Musk (Triplet)
  • Mother: Justine Wilson
  • Born: 2006 (via IVF)
• X Æ A-Xii Musk (Nickname: X)
  • Mother: Grimes (Claire Elise Boucher)
  • Born: May 4, 2020
  • Note: Originally named X Æ A-12, the name was legally changed to X Æ A-Xii to comply with California law, which prohibits numbers in a name.
• Exa Dark Sideræl Musk (Nickname: Y)
  • Mother: Grimes (Claire Elise Boucher)
  • Born: December 2021 (via surrogate)
• Strider Musk (Twin)
  • Mother: Shivon Zilis
  • Born: November 2021
• Azure Musk (Twin)
  • Mother: Shivon Zilis
  • Born: November 2021
• Techno Mechanicus Musk (Nickname: Tau)
  • Mother: Grimes (Claire Elise Boucher)
  • Born: Announced in September 2023
• Seldon Lycurgus Musk
  • Mother: Shivon Zilis
  • Born: Reported in 2025
  • Note: This is a very recent, unconfirmed report suggesting a third child with Zilis, bringing the total to 13 confirmed children.
• Unconfirmed Child (Claimed by Ashley St. Clair)
  • Mother: Ashley St. Clair (Conservative Influencer)
  • Born: September 2024
  • Note: Ashley St. Clair publicly claimed in February 2025 to have given birth to a child fathered by Musk. This claim is currently unverified by Musk himself.

The total number of children, therefore, currently sits at 13 confirmed living children, plus the late Nevada Alexander, and the unconfirmed child from Ashley St. Clair, leading to the media's current reporting of "up to 14 children."

Decoding the Futuristic Names: The Meanings Behind X, Y, and Tau

The names chosen for the children of Elon Musk and Grimes are arguably the most unique in celebrity history, prompting widespread curiosity and confusion. They are a deliberate blend of mathematics, space exploration, and elven language, reflecting the couple's shared interest in advanced concepts and science fiction.

The first child, X Æ A-Xii, is a complex equation that Grimes broke down for the public:

• X: Represents "the unknown variable."
• Æ: The "elven spelling of AI" (Artificial Intelligence) or love.
• A-Xii: A reference to the Lockheed SR-71 Blackbird's predecessor, the A-12 Archangel, which is Grimes' favorite aircraft. The "A" also stands for "Archangel," which is her favorite song.

The name is pronounced "Ex Ash A Twelve" or "Ex Ai Archangel," depending on who is speaking, though Musk has famously corrected interviewers on the pronunciation.

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Their second child, a daughter nicknamed Y, has the full name Exa Dark Sideræl. The meaning is equally layered:

• Exa: A reference to ExaFLOPS, a unit of computing performance.
• Dark: Represents "the unknown." According to Grimes, it is "the beauty of the unknown dark matter."
• Sideræl: A more elven spelling of "sidereal," meaning "of the stars." It is also a nod to her favorite Lord of the Rings character, Galadriel.

The third child with Grimes, Techno Mechanicus (or Tau), continues the technological theme. "Tau" is the 19th letter of the Greek alphabet, often used in mathematics and physics, while "Mechanicus" clearly evokes themes of engineering, robotics, and the future of machinery, aligning perfectly with the Tesla and SpaceX founder's ambitions.

The Twins and Triplets: Children with Justine Wilson

Musk's first marriage to Justine Wilson produced five children, born through IVF after the tragic loss of their first son, Nevada Alexander. The names chosen for these children are far more traditional than those of his later offspring, reflecting a different phase in his life and a more conventional approach to parenting.

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The first set were the twins, Griffin and Vivian Jenna Musk, born in 2004. The second set were the triplets, Kai, Saxon, and Damian Musk, born in 2006. These children are now young adults, and their lives have occasionally entered the public eye, most notably in 2022 when Vivian Jenna Musk filed a petition to legally change her name.

Vivian’s decision to sever ties with her father's name highlights the profound complexities that can arise within a famous family. Her choice to adopt her mother’s maiden name and her public statement about not wishing to be related to her biological father have sparked global conversations about celebrity parenting, family dynamics, and the personal cost of extreme public scrutiny. This event is a critical entity in the narrative of the Musk family, offering a human-interest element that contrasts sharply with the high-tech names of her half-siblings.

The Latest Additions: Children with Shivon Zilis and the 2025 Claims

In a surprising revelation, it was confirmed that Musk had secretly welcomed twins with Shivon Zilis, a top executive at his neurotechnology company, Neuralink, just weeks before his first child with Grimes (Exa Dark Sideræl) was born via surrogate. The twins were named Strider Musk and Azure Musk. These names, while less abstract than X and Y, still possess a unique, almost mythological quality.

The most recent reports, surfacing in 2025, suggest that the family is continuing to grow. One report indicates a third child with Shivon Zilis named Seldon Lycurgus. Seldon is likely a reference to Hari Seldon, a pivotal character in Isaac Asimov's *Foundation* series—a clear nod to Musk's love for science fiction and his vision for the future of civilization. Lycurgus is an ancient, legendary Spartan lawgiver, suggesting a theme of structure and governance.

Furthermore, the unverified claim by conservative influencer Ashley St. Clair in early 2025 has added another layer of intrigue, claiming a child born in September 2024. While the claim remains unconfirmed by Musk's representatives, it has become a major talking point in celebrity news, further cementing the tech billionaire's reputation for an unconventional and rapidly expanding personal life.

The Significance of the Musk Family's Growth

The sheer size and unconventional nature of Elon Musk's family are often viewed through the lens of his public statements about the declining birth rate, which he frequently calls one of the greatest threats to human civilization. His personal choices, therefore, are seen by many as a direct, real-world application of his philosophical beliefs. The names themselves—from the mathematical X Æ A-Xii to the mythological Seldon Lycurgus—serve as a constant reminder of his futuristic vision and his deep commitment to science, space, and a multi-planetary future.

This dynamic family structure, with children ranging from young adults to infants and mothers spanning different spheres of his professional and personal life, ensures that the Musk name, and the fascinating stories behind each unique child, will remain a topic of global discussion for decades to come. The "famous family" continues to evolve, creating its own unique "birth timeline" that is as complex and forward-thinking as the man himself.