The Definitive List Of Elon Musk's 14 Children: Names, Mothers, And The Meaning Behind The Unconventional

As of December 2025, the family tree of tech mogul Elon Musk has expanded to a total of 14 children, a number that has continually made headlines and sparked global curiosity. The Tesla, SpaceX, and X (formerly Twitter) CEO has openly embraced his mission to combat underpopulation, resulting in a complex and growing family structure with four different partners. This comprehensive guide provides the most current, definitive list of all his children, their names, their mothers, and the fascinating, often unconventional meanings behind their unique monikers. The list of "Musk-eteers," as some have dubbed them, spans over two decades, starting with his first child in 2002 and including several new additions reported in late 2024 and early 2025. From classic names to complex alphanumeric sequences, the names chosen for his children are as distinctive as the man himself, reflecting his lifelong interests in science, technology, mythology, and space exploration.

Elon Musk: A Complete Biography of His Children

The following list details all 14 of Elon Musk's children in chronological order of birth, along with their mothers. The children are shared with four different women: Canadian author Justine Wilson, musician Grimes (Claire Boucher), Neuralink executive Shivon Zilis, and conservative influencer Ashley St. Clair.

• Mother: Justine Wilson (6 Children)
  • Nevada Alexander Musk (Born 2002): Tragically passed away from Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
  • Griffin Musk (Born 2004): Twin to Vivian.
  • Vivian Jenna Wilson (Born 2004): Twin to Griffin. Formerly named Xavier, she legally changed her name and gender in 2022, adopting her mother's maiden name.
  • Kai Musk (Born 2006): Triplet.
  • Saxon Musk (Born 2006): Triplet.
  • Damian Musk (Born 2006): Triplet.
• Mother: Grimes (Claire Boucher) (3 Children)
  • X Æ A-Xii (X) (Born 2020): Son, originally named X Æ A-12, later changed to comply with California law.
  • Exa Dark Sideræl (Y) (Born 2021): Daughter, born via surrogate.
  • Techno Mechanicus (Tau) (Born 2022): Son, whose existence was revealed in a 2023 biography.
• Mother: Shivon Zilis (4 Children)
  • Strider (Born 2021): Twin to Azure, born just weeks before Exa Dark Sideræl.
  • Azure (Born 2021): Twin to Strider.
  • Arcadia (Born February 2024): The third child with Zilis, a daughter.
  • Seldon Lycurgus (Born January 2025): The fourth child with Zilis, whose name was recently reported, making him one of the newest additions to the Musk family.
• Mother: Ashley St. Clair (1 Child)
  • Romulus (Born Fall 2024): The 14th child, a son, whose birth was reported in late 2024.

The Fascinating Meanings Behind Musk’s Most Unique Names

While the children with Justine Wilson bear relatively traditional names, the children shared with Grimes (Claire Boucher) have names that stand out for their complexity, reflecting the parents' shared interests in science fiction, mathematics, and advanced technology. These names are a significant part of the topical authority surrounding the Musk family.

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

The name of Musk and Grimes' first son is a complex puzzle with a specific meaning explained by the parents.

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• X: Represents "the unknown variable" in mathematics.
• Æ: Is an Elven spelling of "AI," which stands for Artificial Intelligence or love.
• A-Xii: Refers to the Lockheed SR-71 Blackbird's predecessor, the "Archangel-12," which the couple considers their favorite aircraft—a machine built for speed and stealth.

Exa Dark Sideræl (Pronounced "Exa Dark Sigh-deer-ee-el")

The daughter's name, often shortened to 'Y', is equally rooted in technological and cosmic concepts.

• Exa: A reference to the term Exaflop, which is a unit of computing speed equal to one quintillion floating-point operations per second—a nod to the immense power of supercomputing.
• Dark: Represents "dark matter" or "the unknown."
• Sideræl: Pronounced "sigh-deer-ee-el," this is a more elven spelling of Sidereal, meaning "of the stars" or relating to the true time of the universe, not the solar day.

Techno Mechanicus (Pronounced "Tau")

The third child with Grimes, nicknamed Tau, continues the theme of advanced technology and engineering. While the specific meaning has not been as extensively detailed as his siblings, the name itself clearly evokes the world of mechanics, engineering, and the future of robotics and automation—themes central to Musk's companies like Tesla and SpaceX.

The Growing Musk Family: A Look at the Mothers and Co-Parenting

The narrative of Elon Musk's family is also defined by the four mothers of his children, each with their own unique relationship and co-parenting dynamic with the billionaire. This is a crucial area for topical authority, as it highlights the complexity of his personal life alongside his professional endeavors.

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Justine Wilson: A Canadian author, she was Musk's first wife. Their relationship produced a set of twins and a set of triplets. She has been open about her experiences co-parenting and the challenges of raising a large family with a high-profile figure. Her children are the oldest and include Vivian Jenna Wilson, who has become a public figure after her legal name change.

Grimes (Claire Boucher): The avant-garde musician and artist shares three children with Musk. Their relationship and the subsequent naming of their children have drawn immense media attention. Grimes has described their co-parenting arrangement as "fluid" and focused on giving the children a creative and technologically immersed upbringing.

Shivon Zilis: A high-ranking executive at Musk's neurotechnology company, Neuralink, Zilis shares four children with Musk, including the 2021 twins Strider and Azure, and the most recent additions, Arcadia and Seldon Lycurgus. Their relationship has been kept largely private, but the twins' birth was revealed through court documents. Zilis is a key figure in the AI and tech world, aligning with Musk's professional interests.

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Ashley St. Clair: The newest addition to the list of mothers, conservative influencer Ashley St. Clair, welcomed son Romulus in Fall 2024. This latest development underscores Musk's public stance on the importance of having children to address the global "underpopulation crisis."

The Philosophical Intent Behind the 'Legion' of Children

Elon Musk has repeatedly stated that his large family is a conscious effort to combat what he perceives as a global underpopulation crisis. The sheer number of children, now at 14, is seen by some as a direct manifestation of his philosophy that having a high birth rate is essential for the survival and progress of human civilization. This intention provides a deeper context for the ever-expanding Musk family tree.

The names of his children—particularly the younger ones—often draw inspiration from classical history (Romulus), mythology (Lycurgus), and advanced concepts in science and engineering (Techno Mechanicus, Exa Dark Sideræl). These choices reflect an aspiration for a future where his descendants are connected to the grand narrative of human progress and space exploration, the core mission of SpaceX. The continued, and often surprising, expansion of the Musk kids list ensures that the public remains fascinated by the intersection of his personal life and his futuristic vision for humanity.