14 Children, 3 Mothers: The Complete List Of Elon Musk’s Baby Names And Their Bizarre Meanings (Updated 2025)

The names of Elon Musk's children are arguably as famous—and as complex—as his space rockets and electric cars. As of late 2024 and early 2025, the billionaire entrepreneur has an astonishing 14 known children with three different women, a roster that is constantly being updated with new, often cryptic, additions. The latest confirmed names, including Arcadia and Seldon Lycurgus, continue the pattern of blending ancient history, science fiction, and technical terms, leaving the public continually fascinated by the unique nomenclature of the Musk dynasty. This comprehensive, December 2025 updated list breaks down every known child's name, their mother, and the often-bizarre meanings behind the monikers, providing the freshest details on the newest members of the Musk family and the recent name changes that have kept the world guessing.

The Full Roster: Elon Musk's 14 Children and Their Mothers

Elon Musk has fathered 14 known children with three different women: his first wife, Canadian author Justine Wilson; musician Grimes (Claire Elise Boucher); and Neuralink executive Shivon Zilis. The following is a complete, up-to-date list of all his children, including the most recent additions and name changes.

• Mother: Justine Wilson (6 Children)
  • Nevada Alexander Musk: Born 2002. Tragically died of SIDS at 10 weeks old.
  • Griffin Musk: Born 2004 (Twin).
  • Vivian Jenna Wilson: Born 2004 (Twin). Formerly Xavier Musk, Vivian legally changed her name and gender identity in 2022.
  • Kai Musk: Born 2006 (Triplet).
  • Saxon Musk: Born 2006 (Triplet).
  • Damian Musk: Born 2006 (Triplet).
• Mother: Grimes (Claire Elise Boucher) (3 Children)
  • X Æ A-Xii Musk (Nickname: "Little X"): Born May 2020. Originally named X Æ A-12, the name was legally changed to use Roman numerals.
  • Exa Dark Sideræl Musk (Nickname: "Y" or "?"): Born December 2021 (via surrogate). Grimes has since revealed the child is often referred to simply as 'Y' or even the question mark symbol '?' due to another name change.
  • Techno Mechanicus Musk (Nickname: "Tau"): Born 2023. Revealed in the biography *Elon Musk* by Walter Isaacson.
• Mother: Shivon Zilis (5 Children)
  • Strider Musk: Born 2021 (Twin).
  • Azure Musk: Born 2021 (Twin).
  • Arcadia Musk: Born February 28, 2024. A daughter, confirmed as one of the newest additions.
  • Seldon Lycurgus Musk: Born 2024. Confirmed as the 14th known child.

The Cryptic Meanings Behind Grimes' Sci-Fi Naming Convention

The three children Musk shares with musician Grimes, whose real name is Claire Elise Boucher, have names that are arguably the most complex and conversation-starting in the modern celebrity world. These names are a deep dive into computing, space exploration, and Elven languages, reflecting the couple's unique interests and providing a wealth of topical authority for name enthusiasts and tech observers.

X Æ A-Xii: The Unknown Variable and the Stealth Bomber

The eldest of Grimes' children, originally named X Æ A-12, had to have his name slightly modified due to California law prohibiting numbers in a legal name, resulting in X Æ A-Xii.

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• X: Represents "the unknown variable."
• Æ: The Elven spelling of AI (Artificial Intelligence) and/or "love."
• A-Xii: A reference to the Lockheed SR-71 Blackbird's predecessor, the Archangel-12 (A-12), which the couple described as their favorite aircraft—a machine that is "great, but non-violent."

The name is pronounced by Grimes as simply "X A.I. Archangel." The child is often affectionately referred to as "Little X" for simplicity, a necessary shorthand for such a complex name.

Exa Dark Sideræl and Techno Mechanicus: From Computing to Mythology

The second and third children with Grimes continue the trend of high-concept, highly technical names. Their daughter, born via surrogate, was named Exa Dark Sideræl Musk, though she is now often called 'Y' or '?'

• Exa: A reference to exaFLOP, a computing term for the performance of a supercomputer, representing a billion billion floating-point operations per second.
• Dark: Symbolizes "the unknown."
• Sideræl: An Elven spelling of "sidereal," meaning relating to or determined by the stars.

Their third child, Techno Mechanicus, nicknamed "Tau," also carries a heavy technical weight. "Tau" is the Greek letter (τ) often used in physics and mathematics, while "Mechanicus" clearly evokes technology, engineering, and the world of machines—a perfect fit for the son of the founder of Tesla and SpaceX.

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The Newest Additions: Arcadia and Seldon Lycurgus Musk

The most recent and freshest updates to the Musk family tree come from his relationship with Neuralink executive, Shivon Zilis. The couple, who already shared twins Strider and Azure, welcomed two more children in 2024, confirming the total count of known children to 14.

Arcadia Musk: A Nod to Utopia

The first of the two newest additions is a daughter, Arcadia Musk, born in February 2024. The name "Arcadia" is derived from the region in Greece, often romanticized in Renaissance poetry as a pastoral utopia—a land of simple, idyllic bliss. This choice is a noticeable departure from the highly technical names of his children with Grimes, leaning instead toward classical and literary references.

Seldon Lycurgus Musk: The Fusion of Sci-Fi and Ancient Law

The 14th known child is a son named Seldon Lycurgus Musk. This name is a powerful fusion of science fiction and ancient history, providing a fascinating insight into Musk's intellectual influences.

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• Seldon: A direct reference to Hari Seldon, the fictional mathematician and founder of the field of psychohistory in Isaac Asimov's seminal *Foundation* science fiction series. Asimov's work is known to be a major influence on Musk's vision for humanity's future, particularly the colonization of Mars.
• Lycurgus: This name is inspired by the ancient Greek lawgiver Lycurgus of Sparta, who is credited with establishing the militaristic and disciplined social structure of the Spartan state. The name choice emphasizes a reverence for foundational principles and societal structure, linking back to classical philosophy and governance.

The combination of a sci-fi visionary (Hari Seldon) and a historical lawgiver (Lycurgus) suggests a naming philosophy focused on building and governing a new, future society, a theme that aligns perfectly with Musk's work at SpaceX and Neuralink.

The Naming Philosophy: A Blend of Classical, Science, and Tech Entities

The names of Elon Musk's children, from the classic Roman names of his triplets (Kai, Saxon, Damian) to the highly conceptual names of his youngest, reveal a clear pattern. They are not merely names; they are references to entities that hold deep significance in the fields of science, technology, history, and mythology. The names are a masterclass in curiosity-driven nomenclature, designed to provoke thought and discussion. They weave together a narrative of future-focused exploration, whether through the Elven spelling of AI, the computing term exaFLOP, the ancient Greek ideal of Lycurgus, or the science fiction of Hari Seldon. This unique approach ensures that the Musk children, much like their father's ventures, are never far from the global spotlight.

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