The Full List Of Elon Musk's 14 Children: Unpacking The Wildest, Most Futuristic Names And Their Secret Meanings
The family tree of Elon Musk, the CEO of Tesla and SpaceX, is one of the most talked-about topics in the tech world, not least because of the sheer size of his growing brood and the incredibly unique, often futuristic names he chooses for his children. As of late 2025, Musk is a father to 14 children with four different women, a number that has expanded significantly even in the last year, reflecting his public concerns about population collapse.
This comprehensive, updated article details every one of the 'Musk-eteers,' from his firstborn son in the early 2000s to the most recent additions in 2024. We break down the complete list of names, the mothers of his children—Justine Wilson, Grimes, and Shivon Zilis—and the complex, often cryptic meanings behind the names that have captured global curiosity.
The Complete Chronological List of Elon Musk's 14 Children and Their Mothers
Elon Musk’s children are born from three significant relationships, with the latest additions arriving in 2024. The total number of children is 14, though one son tragically passed away in infancy. Below is the full, chronological list of his children, spanning over two decades of fatherhood.
- Nevada Alexander Musk (Born 2002)
- Mother: Justine Wilson
- Note: Nevada was Musk's first child but tragically passed away from Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
- Griffin Musk & Vivian Jenna Musk (Twins, Born 2004)
- Mother: Justine Wilson
- Note: Born via In Vitro Fertilization (IVF). Vivian, formerly known as Xavier, legally changed her name in 2022 to take her mother's maiden name, Wilson.
- Kai Musk, Saxon Musk, & Damian Musk (Triplets, Born 2006)
- Mother: Justine Wilson
- Note: Also born via IVF, completing the six children with his first wife.
- X Æ A-XII Musk (Nicknamed "X," Born May 2020)
- Mother: Grimes (Claire Boucher)
- Note: The first child with the Canadian musician, whose name originally included a numeral '12' that was later changed to the Roman numeral 'XII' to comply with California law.
- Strider Musk & Azure Musk (Twins, Born November 2021)
- Mother: Shivon Zilis
- Note: Strider Sekhar Sirius and Azure Astra Alice, born just weeks before the arrival of Musk’s second child with Grimes.
- Exa Dark Sideræl Musk (Nicknamed "Y," Born December 2021)
- Mother: Grimes (Claire Boucher)
- Note: Born via surrogate. Her full name, revealed months later, is arguably the most complex of the bunch.
- Techno Mechanicus (Nicknamed "Tau," Born June 2022)
- Mother: Grimes (Claire Boucher)
- Note: The third child with Grimes, whose existence was revealed in Walter Isaacson's 2023 biography of Musk.
- Arcadia Musk & Seldon Lycurgus Musk (Born February 2024)
- Mother: Shivon Zilis
- Note: The newest additions to the family, confirmed in June 2024, expanding his children with the Neuralink executive to four.
The Mothers: Justine Wilson, Grimes, and Shivon Zilis
The women who share children with Elon Musk are accomplished figures in their own right, spanning the fields of literature, avant-garde music, and high-level artificial intelligence (AI) technology.
Justine Wilson: Author and First Wife
Justine Wilson is a Canadian author, known for her contemporary fantasy novel, BloodAngel, and her short story collection, Uninvited. She met Elon Musk while they were both students at Queen's University in Ontario. Their marriage lasted from 2000 to 2008, during which time they welcomed six children together. Wilson has been outspoken about their relationship and her experience of raising a large family through IVF, providing a candid perspective on the challenges of their public life.
Grimes (Claire Boucher): The Avant-Garde Musician
Claire Elise Boucher, known professionally as Grimes, is a highly influential Canadian electronic pop musician and visual artist. Her music is noted for its blending of various genres, including dream pop, R&B, and experimental electronic music. Grimes and Musk's on-again, off-again relationship began in 2018 and has been defined by their shared interest in science fiction, technology, and futuristic concepts, which is clearly reflected in their children's names.
Shivon Zilis: Neuralink Executive and AI Expert
Shivon Zilis is a Canadian venture capitalist and a leading figure in the world of Artificial Intelligence. She serves as a Director of Operations and Special Projects at Neuralink, one of Musk’s neurotechnology companies, and previously held a position on the board of OpenAI. Zilis is a graduate of Yale University and has been deeply involved in the AI and machine learning fields for years. Her professional connection to Musk’s ventures highlights the interwoven nature of his personal and professional life.
Decoding the Cryptic: Meanings Behind the Unique Names
The children Musk shares with Grimes and Shivon Zilis have names that sound less like traditional monikers and more like characters from a sci-fi epic. These names are loaded with references to supercomputing, aviation history, and fantasy literature, offering a fascinating glimpse into the parents' esoteric interests.
The Meaning of X Æ A-XII (X)
The name X Æ A-XII is a complex cipher, explained by Grimes as follows:
- X: Represents "the unknown variable" in mathematics and science.
- Æ: Pronounced "Ash," this is the Elven spelling of AI, a reference to both Artificial Intelligence and the word "love" in some languages.
- A-XII: This is a tribute to the "Archangel," the internal name for the SR-71 Blackbird, Musk’s favorite aircraft, known for its speed and stealth.
The name was initially challenged under California law, which restricts names to the 26 letters of the English alphabet, leading to the slight modification from 'A-12' to 'A-XII'.
Exa Dark Sideræl (Y): Supercomputing and Cosmic Time
Exa Dark Sideræl, nicknamed "Y," continues the theme of high-tech and cosmic references:
- Exa: A nod to exaFLOP, a unit of supercomputing performance, specifically one quintillion floating-point operations per second.
- Dark: Refers to dark matter, the mysterious, non-luminous substance that makes up the majority of the universe's mass. It represents the unknown.
- Sideræl: A unique, "more elven" spelling of the word sidereal, which relates to the true time of the universe as measured by the stars, rather than Earth-bound solar time.
Techno Mechanicus (Tau): The Technical Nickname
The third child with Grimes, Techno Mechanicus, is simply known by his nickname, "Tau." While the full name is a clear homage to technology and mechanics, "Tau" itself is the 19th letter of the Greek alphabet, commonly used in mathematics and physics to represent concepts like torque or time constants, fitting the family's pattern of scientific references.
Strider and Azure: Fantasy and Color
The names of the twins with Shivon Zilis are less abstract but still unique. Strider Sekhar Sirius and Azure Astra Alice carry middle names that add a celestial and adventurous flair.
- Strider: This is a likely reference to Aragorn's alias in J.R.R. Tolkien’s epic fantasy series, The Lord of the Rings, a character associated with exploration and adventure.
- Azure: A beautiful, vibrant blue color, often associated with the sky or the open sea, symbolizing clarity and depth.
The Growing Family: A Philosophical Statement
Elon Musk's large and rapidly expanding family is not just a personal matter; it is tied directly to his public platform on global demographics. He has frequently voiced his concern over a declining birth rate and "population collapse," stating that having children is a way to "help the underpopulation crisis." This philosophical stance serves as the backdrop for his family's growth, making each new arrival a subject of global interest.
The diversity of his children’s names—from the traditional, like Griffin and Damian, to the deeply technical, like Exa Dark Sideræl and Techno Mechanicus—illustrates a blend of classic and futuristic worldviews. As the family continues to grow, the 'Musk-eteers' will remain a fascinating example of how technology, science fiction, and personal philosophy can intersect in the world's most high-profile families.
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