Elon Musk's 14 Children: The Complete List Of Names, Ages, And Their Four Mothers (2025 Update)
The world's most prolific billionaire, Elon Musk, has once again expanded his already famously large family, with recent announcements in early 2025 bringing his total number of children to a staggering 14. This ever-growing family tree, often referred to as his "Musk-eteers," spans four different mothers and features some of the most unconventional, futuristic, and mathematically-inspired names in modern history. As of December 2025, the dynamics of the Musk family continue to evolve, reflecting the tech mogul's controversial views on population decline and his personal philosophy.
The latest updates, confirmed in early 2025, include the birth of his 13th and 14th children, adding new layers of complexity and intrigue to the life of the SpaceX and Tesla CEO. This comprehensive guide breaks down every child, their unique names, their mothers, and the latest details known about the newest additions to the Musk dynasty, providing the freshest information available today, December 19, 2025.
Elon Musk's 14 Children: A Complete Biographical List (As of December 2025)
Elon Musk is the father of 14 children with four different women. His journey into fatherhood began in the early 2000s with his first wife, Justine Wilson, and has continued into the mid-2020s, with each child's name often becoming a global headline.
- Nevada Alexander Musk (Deceased)
- Mother: Justine Wilson
- Born: 2002
- Died: 10 weeks old (SIDS)
- Griffin Musk (Twin)
- Mother: Justine Wilson
- Born: 2004 (Age ~21)
- Vivian Jenna Wilson (Twin)
- Mother: Justine Wilson
- Born: 2004 (Age ~21)
- Note: Legally changed her name in 2022 to reflect her mother's maiden name.
- Kai Musk (Triplet)
- Mother: Justine Wilson
- Born: 2006 (Age ~19)
- Saxon Musk (Triplet)
- Mother: Justine Wilson
- Born: 2006 (Age ~19)
- Damian Musk (Triplet)
- Mother: Justine Wilson
- Born: 2006 (Age ~19)
- X Æ A-Xii Musk (X)
- Mother: Grimes (Claire Elise Boucher)
- Born: May 2020 (Age ~5)
- Note: Originally named X Æ A-12, the name was legally changed due to California state rules prohibiting numerals in a name.
- Exa Dark Sideræl Musk (Y)
- Mother: Grimes (Claire Elise Boucher)
- Born: December 2021 (Via surrogate) (Age ~4)
- Note: Often referred to by the nickname 'Y' or 'Sailor'. Her mother, Grimes, has also referred to her simply as 'Y'.
- Strider Zilis Musk (Twin)
- Mother: Shivon Zilis
- Born: November 2021 (Age ~4)
- Azure Zilis Musk (Twin)
- Mother: Shivon Zilis
- Born: November 2021 (Age ~4)
- Techno Mechanicus Musk (Tau)
- Mother: Grimes (Claire Elise Boucher)
- Born: Undisclosed (Revealed in September 2023) (Age ~2-3)
- Note: The existence of this third child with Grimes was revealed in Walter Isaacson's biography of Musk. His nickname is "Tau."
- Arcadia Zilis Musk
- Mother: Shivon Zilis
- Born: Undisclosed (Revealed March 2025) (Age ~1-2)
- Romulus Musk
- Mother: Ashley St. Clair
- Born: September 2024 (Revealed February 2025) (Age ~1)
- Note: Conservative journalist Ashley St. Clair announced the birth in February 2025.
- Seldon Lycurgus Zilis Musk
- Mother: Shivon Zilis
- Born: Undisclosed (Revealed March 2025) (Age ~0-1)
- Note: The fourth child with Neuralink executive Shivon Zilis, announced shortly after Romulus.
The Unconventional Naming Conventions: From X Æ A-Xii to Techno Mechanicus
The names of Elon Musk’s children, particularly those shared with musician Grimes (Claire Elise Boucher), have consistently captured global attention, blending science fiction, mathematics, and philosophy. These names are not merely eccentric choices; they are deeply rooted in the couple's shared interests in technology, space, and a futuristic outlook, adding significant topical authority to the discussion of the Musk family.
The Grimes Trilogy: X, Y, and Tau
The three children Musk shares with Grimes—X Æ A-Xii, Exa Dark Sideræl, and Techno Mechanicus—form a thematic trilogy based on abstract concepts and advanced technology. The firstborn, X Æ A-Xii, quickly became a cultural phenomenon. The "X" stands for the unknown variable, "Æ" is the Elven spelling of "Ai" (love and/or artificial intelligence), and "A-Xii" refers to the Lockheed SR-71 Blackbird, an aircraft known for its speed and stealth.
Their second child, a daughter, was named Exa Dark Sideræl, though she is affectionately known as 'Y' or 'Sailor'. The name is a nod to "Exa," a supercomputing term, "Dark," for the unknown of dark matter, and "Sideræl," a more Elven spelling of 'sidereal,' meaning "of the stars."
The third, and most recent, revelation from the Grimes-Musk partnership is a son named Techno Mechanicus, who goes by the nickname Tau. The name "Techno Mechanicus" is a clear reference to advanced mechanics and technology, while "Tau" is the Greek letter often used in mathematics and engineering, continuing the theme of scientific and futuristic monikers. The reveal of "Tau" in Walter Isaacson's authorized biography of Musk cemented the public's fascination with their unique naming style.
The Neuralink Connection: Shivon Zilis and the Newest Additions
The other major branch of the Musk family tree involves Shivon Zilis, a top executive at Musk's brain-chip company, Neuralink. The pair share four children, including the twins Strider and Azure, and the two recently revealed children, Arcadia and Seldon Lycurgus. The children with Zilis were born in close proximity to the children with Grimes, sparking considerable public discussion about the billionaire's personal life and his stated mission to combat falling birth rates.
The names of the Zilis children are also unique, though perhaps less abstract than the Grimes children. Strider and Azure were born in November 2021. The names of the two newest children, Arcadia and Seldon Lycurgus, were revealed in early 2025. The name Seldon Lycurgus, in particular, has a classical and science-fiction resonance, with 'Seldon' potentially referencing Hari Seldon from Isaac Asimov's Foundation series, a known inspiration for Musk.
The relationship with Zilis highlights the deep integration of Musk's personal life with his professional ventures, as Zilis holds a prominent position within the Neuralink company. The existence of the twins was initially kept private, only being revealed in court documents related to a name change petition. The recent announcements of Arcadia and Seldon Lycurgus further solidify Zilis's role as a major part of the Musk family structure.
The First Family and the Latest Surprise: Justine Wilson and Ashley St. Clair
Elon Musk's first five living children were with his first wife, Canadian author Justine Wilson. After the tragic loss of their first son, Nevada Alexander, to SIDS, the couple had twins Griffin and Vivian Jenna Wilson, followed by triplets Kai, Saxon, and Damian. These children, born between 2004 and 2006, are now young adults. Vivian Jenna Wilson made headlines in 2022 after legally changing her name and severing ties with her father, stating she no longer wished to be related to him "in any way, shape or form."
The most recent addition to the public's knowledge of the Musk family came in early 2025 with the announcement of a son, Romulus, with conservative journalist and influencer Ashley St. Clair. Romulus, born in September 2024, is named after one of the legendary founders of Rome, continuing a theme of historically powerful and significant names within the broader family. The news of Romulus's birth, followed quickly by the revelation of Seldon Lycurgus, underscored the rapid expansion of the Musk family in the mid-2020s.
Musk has openly spoken about his belief that underpopulation is a greater threat to civilization than overpopulation, a philosophy that seems to be reflected in his personal life. While he has publicly admitted that it is "impossible" to spend time with all of his children, his commitment to having a large family remains a consistent and defining feature of his public persona. The unique blend of traditional, classical, and cutting-edge futuristic names across his 14 children with four mothers makes the Musk family tree one of the most fascinating and complex in the world today.
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