The Complete List Of Elon Musk's 14 Children: Names, Mothers, And The Secret Meaning Behind 'Romulus' And 'Seldon Lycurgus' (2025 Update)
The Full Biography: Elon Musk's 14 Children and Their Four Mothers
The following list provides a chronological breakdown of all 14 of Elon Musk’s children, their mothers, and the latest known details, reflecting the most current information available in late 2025.
Children with Justine Wilson (5 Children)
Justine Wilson is a Canadian author, known for her dark urban fantasy novels, and was Elon Musk’s first wife (married 2000–2008). They share five children.
- Nevada Alexander Musk: Born 2002. Tragically passed away at 10 weeks old due to Sudden Infant Death Syndrome (SIDS).
- Griffin Musk (Twin): Born 2004.
- Vivian Jenna Wilson (Twin): Born 2004. Vivian legally changed her name in 2022 to take her mother's maiden name and publicly affirm her gender identity.
- Kai Musk (Triplet): Born 2006.
- Saxon Musk (Triplet): Born 2006.
- Damian Musk (Triplet): Born 2006.
Children with Grimes (Claire Elise Boucher) (3 Children)
Grimes is a Canadian musician, singer, songwriter, record producer, and visual artist, known for her unique fusion of dream pop, electronic, and R&B. They share three children, all with highly unique names.
- X Æ A-Xii Musk ('X'): Born 2020. Originally named X Æ A-12, the name was later modified to comply with California state law, which prohibits numbers in a name.
- Exa Dark Sideræl Musk ('Y'): Born late 2021 (via surrogate). Her first name, Exa, is a reference to the supercomputing term exaFLOPS.
- Tau Techno Mechanicus ('T'): Born 2022. The youngest child with Grimes, his name was quietly revealed in Walter Isaacson's biography of Elon Musk.
Children with Shivon Zilis (4 Children)
Shivon Zilis is a key executive in the AI world, currently serving as the Director of Operations and Special Projects at Neuralink and a former board member at OpenAI. She and Musk share four children, including two recently reported additions.
- Azure (Twin): Born late 2021.
- Strider (Twin): Born late 2021.
- Seldon Lycurgus Musk: Born 2025 (latest reported child).
- Fourth Child (Name withheld): Born 2025.
Child with Ashley St. Clair (1 Child)
Ashley St. Clair is a conservative political commentator, author, and social media influencer, known for her contributions to The Babylon Bee. She and Musk share one child.
- Romulus St. Clair: Born late 2024 (Name revealed in early 2025).
Decoding the Cryptic Names: From X Æ A-Xii to Seldon Lycurgus
The names chosen by Elon Musk and his partners are far more than simple labels; they are philosophical statements and tributes to science, mythology, and technology. The most recent additions continue this trend, offering complex layers of meaning that reflect Musk’s personal interests and world views.
The Grimes Trilogy: X, Y, and T
The children with Grimes (Claire Elise Boucher) are arguably the most famous for their unconventional nomenclature, blending mathematics, Elven language, and aviation history.
- X Æ A-Xii: The "X" represents the unknown variable. The character "Æ" is an Elven spelling of 'AI,' which stands for Artificial Intelligence or "love" in some languages. The "A-Xii" is a reference to the Lockheed A-12 Archangel, the precursor to the SR-71 Blackbird, which Musk and Grimes have called "the coolest plane ever."
- Exa Dark Sideræl: The name is a nod to supercomputing and the cosmos. "Exa" refers to exaFLOPS, a unit of computing speed (one quintillion floating-point operations per second). "Dark" represents the unknown, specifically dark matter. "Sideræl" is an Elven spelling of 'sidereal,' meaning relating to or determined by the stars.
- Tau Techno Mechanicus: "Tau" (T) is the 19th letter of the Greek alphabet, often representing a constant in mathematics. The combination of "Techno Mechanicus" is a clear reference to the world of engineering, robotics, and technology that defines Musk’s career.
The Newest Additions: Romulus and the Ancient World
The latest publicly known children, Romulus and Seldon Lycurgus, demonstrate a shift toward classical and science fiction-based inspiration, adding new layers of topical authority to the Musk family saga.
Romulus: The Mythological Founder
The name Romulus, the son of Ashley St. Clair, is a direct and powerful reference to the founding myth of Rome. According to legend, Romulus and his twin brother Remus founded the city of Rome. The name itself is often interpreted to mean "strong and brave," a bold, historically significant choice that moves away from the purely technical names of his other children. The revelation of this child in early 2025, following a paternity verification, was one of the most significant updates to the Musk family tree.
Seldon Lycurgus: A Blend of Sci-Fi and Greek Law
The name Seldon Lycurgus Musk, shared with Shivon Zilis, is a perfect encapsulation of Elon Musk’s dual fascination with advanced science fiction and ancient history.
- Seldon: This is a clear homage to Hari Seldon, the visionary mathematician in Isaac Asimov’s seminal *Foundation* science fiction series. Hari Seldon develops 'psychohistory,' a theoretical science that can predict the future on a galactic scale—a concept that aligns closely with Musk’s long-term vision for humanity's future.
- Lycurgus: The middle name is a tribute to Lycurgus, the legendary lawgiver of ancient Sparta. Lycurgus is credited with establishing the military and social reforms that transformed Sparta into a powerful, austere society. The Greek name is derived from words meaning "wolf" and "work" or "deed," reflecting a theme of strength and foundational structure.
The choice of Seldon Lycurgus, much like the technical references in X Æ A-Xii and Exa Dark Sideræl, underscores Musk’s personal belief in the importance of science, logic, and the establishment of long-lasting societal structures, whether on Earth or Mars. The continued expansion of his family, with names rooted in these grand themes, ensures that the story of his children will remain a topic of global curiosity and discussion for years to come.
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