The 14 'Musk-eteers': A Chronological Look At Elon Musk's Expanding Family Tree In 2025

Elon Musk, the CEO of Tesla and SpaceX, continues to be a central figure in the global conversation, not just for his ventures into space and electric vehicles, but also for his rapidly expanding family. As of December 15, 2025, the billionaire entrepreneur is the father of 14 children with four different women, a fact that aligns directly with his outspoken beliefs about the declining global birth rate and the need for more intelligent people to have children to prevent "civilization collapse." This comprehensive, updated list details every child, from his firstborn son who tragically passed away to the latest additions in his dynamic family tree.

The complexity of the Musk family tree has grown significantly, with the most recent updates in early 2025 revealing the births of additional children, solidifying his position as one of the most prolific fathers in the public eye. His children, affectionately dubbed the 'Musk-eteers' by some, are born to a diverse group of mothers, including his first wife, a musician, a Neuralink executive, and a well-known author. The story of each child offers a unique glimpse into the private life of the world's wealthiest man, often characterized by unconventional names and a commitment to his pro-natalist philosophy.

The Complete List of Elon Musk’s 14 Children and Their Mothers

Elon Musk has welcomed 14 children since 2002, with four women: Canadian author Justine Wilson (his first wife), musician Grimes (Claire Boucher), Neuralink executive Shivon Zilis, and author Ashley St. Clair. This list is presented in chronological order of birth, providing the most current information available in late 2025.

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• Nevada Alexander Musk
• Mother: Justine Wilson
• Born: 2002
• Status: Tragically passed away from Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
• Griffin Musk & Vivian Jenna Wilson (Twins)
• Mother: Justine Wilson
• Born: 2004 (via IVF)
• Details: Vivian, formerly Xavier, legally changed her name and gender identity in 2022, seeking to cut ties with her biological father. Griffin is the other twin.
• Kai Musk, Saxon Musk, & Damian Musk (Triplets)
• Mother: Justine Wilson
• Born: 2006 (via IVF)
• Details: The three boys are now young adults, with their mother, Justine, occasionally sharing insights into their lives.
• X Æ A-12 Musk (X)
• Mother: Grimes (Claire Boucher)
• Born: May 2020
• Details: The name, pronounced "X Ash A Twelve," was famously controversial. Grimes explained that 'X' is the "unknowable variable," 'Æ' is the elven spelling of AI (Artificial Intelligence) or love, and 'A-12' is a tribute to the Lockheed A-12 Archangel reconnaissance aircraft.
• Strider Musk & Azure Musk (Twins)
• Mother: Shivon Zilis
• Born: November 2021 (The public learned of their birth in mid-2022)
• Details: Shivon Zilis is a high-ranking executive at Musk's neurotechnology company, Neuralink. The twins were born weeks before his second child with Grimes.
• Exa Dark Sideræl Musk (Y)
• Mother: Grimes (Claire Boucher)
• Born: December 2021 (via surrogate)
• Details: Affectionately nicknamed "Y," her name is also highly complex, with 'Exa' referring to the supercomputing term exaFLOPS, 'Dark' representing the unknown, and 'Sideræl' being a more elven spelling of sidereal (true time of the universe).
• Techno Mechanicus Musk (Tau)
• Mother: Grimes (Claire Boucher)
• Born: 2023
• Details: Nicknamed "Tau," the third child with Grimes was revealed in a 2023 biography of Elon Musk.
• Arcadia Musk & Seldon Lycurgus Musk
• Mother: Shivon Zilis
• Born: 2024
• Details: These two children were introduced in 2024, bringing the total number of children shared with Shivon Zilis to four.
• Romulus Musk
• Mother: Ashley St. Clair
• Born: 2024 (Revealed in February 2025)
• Details: Romulus is the first child shared with author Ashley St. Clair, whose birth was revealed in early 2025, further expanding the Musk family to 14 children.

The Mothers: A Diverse Group of Accomplished Women

Musk’s decision to have a large family has involved four highly accomplished women, each with a unique connection to his life and career. The public interest in the mothers of his children is a significant component of the overall narrative surrounding the billionaire.

Justine Wilson (Justine Musk), a Canadian author, was his first wife and is the mother of his first six children. They met at Queen's University in Ontario, Canada, and married in 2000. Their relationship, which ended in 2008, has been documented by Justine as challenging, yet they continue to co-parent their five surviving children.

Grimes (Claire Boucher), the Canadian musician and artist, is known for her avant-garde style and is the mother of three of his children, all with highly esoteric names that reflect their shared interest in technology and science fiction. Their relationship, which began in 2018, has been described by Grimes as "very fluid," reflecting their on-again, off-again status and shared creative and intellectual pursuits.

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Shivon Zilis is a key figure in the tech world, serving as an executive at Musk's neurotechnology company, Neuralink. She is also a former project director at Tesla. Zilis, who has Indian ancestry, shares four children with Musk, including two sets of twins. Her professional and personal connection to Musk highlights the blurred lines between his business and personal life, particularly within his own ecosystem of companies.

The most recent addition to the mothers is author Ashley St. Clair, who revealed the birth of their son, Romulus, in early 2025. This revelation further underscored Musk’s commitment to his stated goal of increasing the birth rate.

The Philosophy Driving the Prolific Family: Birth Rate and Civilization

Musk's expanding family is not merely a personal choice but a direct manifestation of his public philosophy on global demographics. He has repeatedly stated that the greatest threat to human civilization is not overpopulation, but rather the declining birth rate, which he views as a path toward population collapse.

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He often uses his platform on X (formerly Twitter) to warn about the societal problems posed by childlessness, arguing that smart, well-resourced individuals should have more children. His own actions—welcoming 14 children with four women—are seen by him as a proactive effort to "practice what he preaches" in the face of what he calls a "nihilistic lie" about overpopulation.

This worldview provides the context for the unconventional structure of his family and the secrecy surrounding some of the births, such as the twins with Shivon Zilis and the most recent additions. The narrative is a blend of personal ambition, technological innovation (given the mothers' connection to Neuralink and Tesla), and a global socio-political agenda focused on the future of humanity. The names of his children with Grimes—such as X Æ A-12, Exa Dark Sideræl, and Techno Mechanicus—are themselves entities that reflect a deep fascination with technology, space, and the future of human existence, linking his private life directly to his public persona as a futurist and technoking.

Musk’s family story is a complex tapestry woven with themes of science, surrogacy, unconventional relationships, and a profound, if controversial, belief in the necessity of a higher birth rate for the survival of the species. As he continues to dominate headlines with SpaceX missions and Tesla innovations, the growth and future of his 14 children will remain a subject of intense public curiosity and speculation.