The 14 'Musk-eteers': A Complete, Updated List Of Elon Musk's Children, Their Mothers, And The Controversial Newest Additions
As of late 2025, the family life of billionaire tech mogul Elon Musk continues to be one of the most talked-about and rapidly changing stories in the world. The Tesla and SpaceX CEO, a vocal proponent of reversing global birth rate decline, has recently confirmed the birth of his 14th child, solidifying his position as one of the most prolific fathers in the public eye.
This comprehensive, up-to-the-minute guide details the full roster of the "Musk-eteers," spanning four different mothers and featuring some of the most unique names in modern history. The list includes several additions and revelations made in 2024 and early 2025, making the family dynamic more complex and controversial than ever before.
The Complete Biography and Chronology of Elon Musk's 14 Children
Elon Musk's children, often referred to as the "Musk-eteers," are the result of relationships with four women: Canadian author Justine Wilson, musician Grimes (Claire Boucher), Neuralink executive Shivon Zilis, and conservative influencer Ashley St. Clair.
- With Justine Wilson (5 Children)
- Nevada Alexander Musk (Born 2002, Deceased 2002): Musk’s first child, who tragically died of Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
- Griffin Musk (Born 2004): Twin son, conceived via IVF.
- Vivian Jenna Wilson (Born 2004): Twin daughter, formerly named Xavier Musk. She legally changed her name and gender in 2022, stating she no longer wished to be related to her biological father.
- Kai Musk (Born 2006): Triplet son, conceived via IVF.
- Saxon Musk (Born 2006): Triplet son, conceived via IVF.
- Damian Musk (Born 2006): Triplet son, conceived via IVF.
- With Grimes (Claire Boucher) (3 Children)
- X Æ A-Xii Musk (Born 2020): Son, nicknamed 'X'. His original name, X Æ A-12, had to be legally adjusted due to California law prohibiting numbers in a name.
- Exa Dark Sideræl Musk (Born 2021): Daughter, nicknamed 'Y'. She was born via surrogate.
- Techno Mechanicus Musk (Nickname 'Tau') (Born undisclosed, revealed 2023): Third child with Grimes, whose existence and name were revealed in a 2023 biography of Musk.
- With Shivon Zilis (4 Children)
- Strider Zilis Musk and Azure Zilis Musk (Born 2021/2022): Boy-girl twins, whose births were revealed in a 2022 court filing. Zilis is a top executive at Musk's Neuralink company.
- Arcadia and Seldon Lycurgus (Born 2024): The latest additions with Zilis, confirming a total of four children between the pair.
- With Ashley St. Clair (1 Child)
- Romulus St. Clair (Born September 2024, confirmed Feb 2025): Son, whose birth was revealed by conservative influencer Ashley St. Clair. This child is widely reported as the 14th addition to the Musk family.
The Controversial New Additions and Legal Battles
The most recent revelations have brought the Musk family's private affairs into the public spotlight, particularly concerning the children born in 2024 and 2025. The confirmation of a total of 14 children—including the fourth child with Shivon Zilis and the first child with Ashley St. Clair—has sparked a renewed debate about the billionaire's personal life and his stated philosophical goals.
The relationship with Shivon Zilis, an executive at Neuralink, has drawn attention due to its professional overlap, raising questions about workplace ethics and the nature of their partnership. The latest additions, Arcadia and Seldon Lycurgus, are reportedly the fourth children the pair share, expanding their family unit significantly and quietly.
Even more controversial is the child with conservative influencer Ashley St. Clair. The son, Romulus St. Clair, was born in September 2024, and the news was confirmed in early 2025. Reports indicate that St. Clair filed a lawsuit in February 2025, claiming Musk had instructed her to keep the baby a secret before allegedly ceasing communication during a child support discussion. Furthermore, Musk’s name is reportedly not on the birth certificate.
This situation highlights the complex and often private legal and personal negotiations that accompany the expansion of the Musk family, contrasting sharply with his public pronouncements on the importance of having children.
The Philosophy Behind the Prolific Family: Pronatalism and Population Collapse
Elon Musk's large and rapidly expanding family is not merely a personal choice; it is strongly linked to his public philosophy on global demographics. He is the world's most famous proponent of "pronatalism," the belief that more births are necessary to sustain human civilization.
Musk frequently warns that a "population collapse" due to declining global fertility rates is one of the greatest threats facing humanity, a risk he considers "much bigger" than global warming. He has repeatedly urged people to have more children, often framing his own large family as a personal effort to combat this existential risk.
This perspective has been dubbed "technophilic pronatalism," a movement among wealthy, highly intelligent individuals who prefer large families as a response to the perceived fertility crisis. His children, with their unique, often science-fiction-inspired names like X Æ A-Xii and Techno Mechanicus, reflect a blend of his futuristic vision and his commitment to reversing demographic decline.
The concept, however, is not without criticism. Critics argue that his focus on population decline distracts from issues of resource distribution and environmental sustainability. Furthermore, his personal actions, such as the controversies surrounding the newest additions, sometimes appear to complicate the idealized image of a patriarch dedicated to saving humanity through procreation.
The Unique Names: Deciphering X Æ A-Xii, Exa Dark Sideræl, and Techno Mechanicus
The children Musk shares with Grimes, the Canadian musician Claire Boucher, are perhaps the most famous for their unconventional names, which often require decoding. These names are a perfect example of LSI entities that define the family's public image.
- X Æ A-Xii (X): The 'X' stands for the unknown variable. 'Æ' is the Elven spelling of AI (artificial intelligence) or 'love.' 'A-Xii' is a reference to the precursor to the SR-71 Blackbird, the A-12, which the couple considered their favorite aircraft.
- Exa Dark Sideræl (Y): 'Exa' refers to the term 'ExaFLOPS,' a unit of computing performance. 'Dark' represents the unknown and the "beautiful mystery of our universe." 'Sideræl' is a "more elven" spelling of sidereal, meaning relating to or determined by the stars.
- Techno Mechanicus (Tau): While the exact meaning has not been fully detailed by Musk or Grimes, the name clearly reflects Musk's deep ties to technology and engineering, with "Techno" and "Mechanicus" invoking themes of machinery and technological prowess. The nickname 'Tau' is the Greek letter often used to represent time or a specific constant in physics.
From the tragic loss of his first son, Nevada, to the latest additions, Romulus and Seldon Lycurgus, Elon Musk's family is a complex tapestry of personal ambition, technological vision, and philosophical commitment. With 14 children across four different mothers, the Musk family continues to be a central topic of discussion, not just for the unique individuals within it, but for the profound questions it raises about the future of human civilization.
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