The Updated List Of Elon Musk’s 14 Children: Names, Meanings, And The Four Mothers

Billionaire entrepreneur Elon Musk’s family has grown significantly, making global headlines with the recent confirmation of his 14th child, a staggering number that has cemented his status as a figurehead for population growth awareness. As of December 2025, the Tesla and SpaceX CEO is a father to 14 children, born to four different women, a complex and fascinating family tree that includes some of the most unusual and futuristic names ever given to a child.

The latest updates in 2024 and 2025 have revealed new additions, including a fourth child with Neuralink executive Shivon Zilis and a son with conservative influencer Ashley St. Clair. The names of his children, ranging from classic Greek and Roman references to complex mathematical and sci-fi entities, are a mirror to Musk’s own fascination with technology, space, and the future of humanity.

The Complete Biography of Elon Musk’s Children and Their Mothers

Elon Musk, born June 28, 1971, is a father of 14 children, though one son, Nevada, tragically passed away. The children were born to four partners: his first wife, Justine Wilson; the musician Grimes (Claire Boucher); Neuralink executive Shivon Zilis; and conservative influencer Ashley St. Clair. This list is presented in chronological order of birth, providing a clear map of the Musk family’s rapid expansion.

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• Mother: Justine Wilson (6 Children)
  • Nevada Alexander Musk (Born 2002, died at 10 weeks from SIDS)
  • Griffin Musk (Twin, born 2004)
  • Vivian Jenna Wilson (Twin, born 2004, formerly Xavier Alexander Musk)
  • Kai Musk (Triplet, born 2006)
  • Saxon Musk (Triplet, born 2006)
  • Damian Musk (Triplet, born 2006)
• Mother: Grimes (Claire Boucher) (3 Children)
  • X Æ A-Xii Musk (Nickname: X) (Son, born 2020)
  • Exa Dark Sideræl Musk (Nickname: Y) (Daughter, born 2021 via surrogate)
  • Techno Mechanicus Musk (Nickname: Tau) (Son, born 2022)
• Mother: Shivon Zilis (4 Children)
  • Strider Musk (Twin, born 2021)
  • Azure Musk (Twin, born 2021)
  • Arcadia Musk (Daughter, born 2024)
  • Seldon Lycurgus Musk (Son, born 2024)
• Mother: Ashley St. Clair (1 Child)
  • Romulus St. Clair (Son, born 2024)

The Sci-Fi and Mathematical Code Behind the Names

The children Musk shares with musician Grimes are undoubtedly the most famous for their unconventional and cryptic names, which read like a fusion of science fiction, mathematics, and Elven language. These names are not random; they are intentional references to technology, space exploration, and esoteric concepts, reflecting the core interests of both parents.

X Æ A-Xii (Pronounced "Ex-Ash-Twelve")

The name of Musk and Grimes' first child caused a global stir, and even required a slight modification to comply with California state law, which prohibits names from containing numbers. The original "A-12" was changed to the Roman numeral "A-Xii."

• X: Represents "the unknown variable."
• Æ: The Elven spelling of "AI," which stands for both "Artificial Intelligence" and "love" in some languages.
• A-Xii: A reference to the Lockheed SR-71 Blackbird’s predecessor, the A-12 Archangel, which is described by the couple as their favorite aircraft—"no weapons, no defenses, just speed. Great in battle, but non-violent."

Exa Dark Sideræl (Nickname: Y)

Their daughter, born via surrogate, was given a name that delves even deeper into the world of supercomputing and astronomy. The nickname "Y" follows the pattern of her older brother "X."

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• Exa: A reference to "exaFLOPS," a unit of computing speed equivalent to one quintillion floating-point operations per second, a term central to the supercomputing world.
• Dark: Represents "the unknown," a common theme in the universe and physics.
• Sideræl: A unique, Elven-inspired spelling of "sidereal," meaning "of the stars" or "of the true time of the universe."

Techno Mechanicus (Nickname: Tau)

The third child with Grimes, whose existence was revealed in Walter Isaacson's biography of Elon Musk, continues the tradition of blending technical and sci-fi terminology. The nickname "Tau" is a clear nod to mathematics.

• Tau: A mathematical term associated with the constant 2π, an alternative to Pi (π).
• Mechanicus: Widely speculated to be a reference to the "Adeptus Mechanicus," a faction of tech-worshippers from the popular science fiction franchise *Warhammer 40,000*.

The Classical and Futuristic Names of the Latest Additions (2024/2025)

The latest confirmed additions to the Musk family, born in 2024, maintain a strong theme of classical history and science fiction, highlighting the ongoing influence of these topics on the billionaire's personal life.

Seldon Lycurgus Musk (Child with Shivon Zilis)

Seldon Lycurgus is one of the four children Musk shares with Neuralink executive Shivon Zilis. This name is a deep dive into both literary science fiction and ancient Greek history.

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• Seldon: A direct homage to Hari Seldon, the visionary mathematician and founder of "Psychohistory" in Isaac Asimov's seminal *Foundation* novel series.
• Lycurgus: A name of Greek origin, derived from words meaning "wolf" and "work" or "deed." It is the name of several legendary figures in Greek mythology, most notably the lawgiver of Sparta.

Romulus St. Clair (Child with Ashley St. Clair)

The name of Musk's child with conservative influencer Ashley St. Clair is a clear reference to one of the most famous figures in Roman history.

• Romulus: In Roman mythology, Romulus was the twin brother of Remus and the legendary founder of the city of Rome. This name continues the classical theme seen in the Zilis children's names.

Vivian Jenna Wilson: The Name Change and Estrangement

One of the most publicly discussed aspects of Elon Musk's family life is the legal name change of his eldest twin, Vivian. Born Xavier Alexander Musk, she filed a petition in 2022 to legally change her name to Vivian Jenna Wilson and her gender, citing a clear desire to separate from her biological father.

The court documents confirmed that the name change was motivated by more than just gender identity. Vivian stated that she "no longer wishes to be related to my biological father in any way, shape or form." The new surname, Wilson, is her mother Justine Wilson’s maiden name. This highly personal decision brought the complexities of the Musk family dynamic into the public sphere, highlighting a significant and widely reported estrangement between the father and his eldest daughter.

The 14 children of Elon Musk, with their uniquely inspired names, represent a fascinating blend of classical literature, cutting-edge technology, and personal philosophy. From the foundational sci-fi of Asimov to the mathematical constant Tau, each name is a carefully chosen entity that reflects the mind of the man who seeks to colonize Mars and accelerate the world's transition to sustainable energy.