The Ultimate List Of Elon Musk's 14 Children: Names, Ages, And The Shocking Meanings Behind Them (2025 Update)

Elon Musk, the CEO of Tesla and SpaceX, is arguably as famous for his prolific family life as he is for his revolutionary business ventures. As of this update in December 2025, the billionaire is the father of 14 children, a number that has continually grown and surprised the public with each new, uniquely named arrival. This comprehensive guide breaks down the full list of the "Musk-eteers," detailing their names, birth order, their mothers, and the complex, often cryptic meanings behind the monikers that have captured global attention.

The names of Musk’s children are a fascinating blend of classical mythology, science fiction, mathematics, and high-tech jargon. From the now-famous alphanumeric code of X Æ A-Xii to the historically significant Romulus and Lycurgus, each name offers a unique insight into the mind of the man who is trying to colonize Mars and accelerate humanity's technological future. The recent additions, including children with Neuralink executive Shivon Zilis and conservative figure Ashley St. Clair, have cemented Musk's vision for a large family and his belief in the importance of population growth.

Elon Musk's Children: A Complete Biographical List (14 Kids, 4 Mothers)

Elon Musk has fathered 14 children with four different women: his first wife Justine Wilson (now Justine Musk), musician Grimes (Claire Boucher), Neuralink executive Shivon Zilis, and conservative influencer Ashley St. Clair. This list is presented in chronological order of birth.

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• Nevada Alexander Musk
• Mother: Justine Musk (née Wilson)
• Born: May 2002
• Status: Tragically died of Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
• Griffin Musk & Vivian Jenna Wilson (Twins)
• Mother: Justine Musk (née Wilson)
• Born: April 15, 2004
• Note: Vivian legally changed her name from Xavier Alexander Musk in 2022 to officially reflect her gender identity and sever ties with her father.
• Kai Musk, Saxon Musk, & Damian Musk (Triplets)
• Mother: Justine Musk (née Wilson)
• Born: January 1, 2006
• Note: The triplets were conceived via IVF, following the birth of the twins.
• X Æ A-Xii Musk (X)
• Mother: Grimes (Claire Boucher)
• Born: May 4, 2020
• Nickname: X
• Strider Sekhar Sirius Zilis & Azure Astra Alice Zilis (Twins)
• Mother: Shivon Zilis
• Born: November 2021
• Note: Their names were revealed publicly in 2022. They were born via IVF.
• Exa Dark Sideræl Musk (Y)
• Mother: Grimes (Claire Boucher)
• Born: December 2021
• Nickname: Y
• Note: Born via surrogate.
• Techno Mechanicus Musk (Tau)
• Mother: Grimes (Claire Boucher)
• Born: June 2022 (birth revealed in Walter Isaacson’s 2023 biography)
• Nickname: Tau
• Arcadia Zilis
• Mother: Shivon Zilis
• Born: February 2024
• Note: Reportedly the third child with Zilis, confirmed by Musk.
• Romulus St. Clair
• Mother: Ashley St. Clair
• Born: September 2024
• Note: The child's name was publicly revealed by the mother amid a paternity dispute. Romulus is a strong entity name referencing the co-founder of Rome.
• Seldon Lycurgus Zilis
• Mother: Shivon Zilis
• Born: Late 2024/Early 2025 (The 14th child)
• Note: The fourth child with Zilis, his name was announced in early 2025.

The Cryptic Meanings Behind The Most Unusual Musk Names

While the names from his first marriage are relatively traditional, the children Musk shares with Grimes and Shivon Zilis bear names that sound like they were pulled directly from a science-fiction epic or a complex engineering manual. This is a deliberate choice, reflecting Musk’s passion for futurism, technology, and classical history, giving his children names with a high degree of topical authority.

X Æ A-Xii (X) and The Alphanumeric Code

The name X Æ A-Xii is perhaps the most famous and difficult-to-pronounce celebrity baby name in history. Grimes, the mother, has publicly broken down the meaning of the name, which had to be slightly altered from the original X Æ A-12 due to California law prohibiting numbers in a name.

• X: Represents "the unknown variable."
• Æ: Is the "elven spelling of AI" (Artificial Intelligence), which also stands for "love."
• A-Xii: Is a reference to the A-12 Archangel, the precursor to the SR-71 Blackbird, which the couple considers the "coolest plane ever." The 'A-12' was changed to the Roman numeral 'A-Xii'.

The pronunciation, according to Musk, is simply "X Ash A Twelve."

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Exa Dark Sideræl (Y) and Techno Mechanicus (Tau)

The second and third children with Grimes followed a similar pattern, blending high-tech and mythological themes. Their daughter, Exa Dark Sideræl, goes by the nickname Y.

• Exa: A reference to ExaFLOPS, a unit of computing performance.
• Dark: Represents "the unknown."
• Sideræl: Pronounced "sigh-deer-ee-el," it is an "elven spelling" of sidereal, meaning relating to the distant stars.

The third child, Techno Mechanicus, is nicknamed Tau.

• Tau: Is a Greek letter used in mathematics to represent 2π, an alternative to Pi. Musk's biographer Walter Isaacson revealed this name.
• Mechanicus: Clearly references the mechanical and technological world, fitting the Musk family's thematic naming convention.

The Classical and Literary References: Strider, Azure, Seldon, and Romulus

The newest additions to the Musk family, particularly those with Shivon Zilis and Ashley St. Clair, show a shift towards names with strong historical, literary, and mythical weight, serving as powerful LSI keywords and entities. This trend reflects a deep dive into foundational texts of civilization and science fiction, further cementing the family's unique identity.

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Strider and Azure Zilis

The twins with Shivon Zilis, Strider and Azure, carry names with distinct meanings. Strider, a name that evokes a sense of travel and adventure, is a direct nod to one of the most famous literary figures in fantasy.

• Strider: Is the alias used by Aragorn, a key hero in J.R.R. Tolkien’s *The Lord of the Rings* trilogy. It signifies a traveler or warrior.
• Azure: Refers to the deep, vivid blue color of the sky and sea, suggesting a connection to vastness and nature, a contrast to the tech-focused names.

Seldon Lycurgus and Romulus

The most recent names announced in late 2024 and early 2025 lean heavily on classical and sci-fi authority figures, demonstrating a clear pattern of intellectual naming.

• Seldon Lycurgus: The first name, Seldon, is a direct reference to Hari Seldon, a fictional mathematician in Isaac Asimov's seminal *Foundation* science fiction series, who develops the predictive science of psychohistory. Lycurgus, the middle name, is an ancient Spartan lawgiver, known for his radical reforms. This combination is a powerful statement about science, law, and the future of civilization.
• Romulus: The son with Ashley St. Clair, Romulus, is named after the legendary founder of Rome, who, along with his twin brother Remus, established the city according to myth. This is one of the most significant names in Western history, symbolizing origin and power.

The Ongoing Saga of The Musk Family

The public interest in Elon Musk’s children is driven not just by their unusual names but by the sheer size and complexity of his family unit. The presence of 14 children with four different mothers—all while running some of the world's most influential companies like SpaceX, Tesla, and X (formerly Twitter)—keeps the topic of "Elon Musk's kids name" consistently relevant and newsworthy.

From the tragic loss of Nevada to the public gender transition of Vivian Jenna Wilson, and the birth of new additions like Arcadia and Seldon Lycurgus, the Musk family continues to be a subject of intense global scrutiny. These names are more than just labels; they are a public reflection of the billionaire's worldview, blending his love for science, technology, mythology, and the grand narrative of human history and the future. The unique naming conventions ensure that each child, from X Æ A-Xii to Romulus and Tau, is instantly recognizable and a talking point in the ongoing discussion about one of the most influential figures of the 21st century.