When public figures choose baby names, they usually stick to traditional family monikers or trendy pop-culture nods. Elon Musk takes a entirely different route. Spanning multiple partnerships with authors, musicians, and corporate executives, the billionaire tech entrepreneur has curated one of the most eccentric, futuristic, and debated rosters of children's names in modern celebrity history.
Understanding these choices requires looking past the viral headlines. Each family branch—whether shared with first wife Justine Wilson, musician Grimes, Neuralink executive Shivon Zilis, or author Ashley St. Clair—tells a distinct story about how Musk and his partners view technology, history, and identity.
The Early Family: Justine Wilson and Traditional Roots
Long before rocket ships and social media acquisitions dominated headlines, Musk welcomed his first six children with Canadian author Justine Wilson. This initial group features names that lean heavily into conventional naming structures, historical references, and literary nods.
- Nevada Alexander Musk (2002): Born as Musk's first child, Nevada tragically passed away at ten weeks old from sudden infant death syndrome (SIDS). His middle name, Alexander, honored family lineage.
- Griffin and Vivian Jenna Wilson (2004): Born via IVF, the twins arrived two years after Nevada's passing. Griffin carries traditional English roots, while Vivian—originally named Xavier—legally changed her name in 2022 to align with her gender identity and adopt her mother's maiden name.
- Kai, Saxon, and Damian (2006): Born as triplets, their names draw from diverse cultural and historical inspirations. Kai means sea or forgiveness across various global languages, Saxon nods to historical Germanic tribes, and Damian derives from Greek origins meaning to tame.
These early choices stayed well within standard societal norms. However, Musk's later relationships marked a sharp departure toward experimental nomenclature.
The Tech-Forward Era: Grimes and Futuristic Monikers
Musk's high-profile relationship with electronic musician Grimes brought avant-garde concepts directly into the nursery. These names function less like traditional identifiers and more like code blocks or science fiction blueprints.
- X Æ A-Xii (2020): Originally registered as X Æ A-12 before California naming laws forced a numerical tweak, their firstborn's name is pronounced "X Ash A Twelve". "X" represents the unknown variable, "Æ" serves as Grimes's elven spelling for artificial intelligence and love, and "A-12" honors the precursor to the SR-71 Blackbird aircraft.
- Exa Dark Sideræl (2021): Born via surrogate, their daughter is nicknamed "Y". "Exa" references the computing term exaFLOPS, "Dark" represents the unknown and dark matter, and "Sideræl" points to sidereal time—the measurement of stellar movement.
- Techno Mechanicus (2022): Affectionately known as "Tau," this name merges mechanical engineering with mathematical constants. The Greek letter tau represents two pi in mathematics, cementing the family's obsession with precise scientific metrics.
Mythological and Literary Influences: Shivon Zilis and Ashley St. Clair
Musk shares several children with Shivon Zilis, Director of Operations and Special Projects at Neuralink, alongside a child with author Ashley St. Clair. This cluster of names shifts away from pure computing toward literature, mythology, and geography.
- Strider and Azure (2021): Born as twins, Strider mirrors Aragorn’s rugged alias in The Lord of the Rings, while Azure represents a vivid sky-blue color.
- Arcadia (2024): This name draws from ancient Greek mythology, symbolizing a mountainous paradise of harmony and natural simplicity.
- Seldon Lycurgus (2025): Welcomed in early 2025, the name combines Isaac Asimov's foundational fictional mathematician Hari Seldon from the Foundation series with historical Spartan lawgiver Lycurgus.
- Romulus (2024): Born in late 2024, this name references the legendary co-founder of Rome, aligning with traditional historical leadership themes.
Common Mistakes When Analyzing Celebrity Naming Trends
Observers frequently misinterpret why public figures choose unusual names. Recognizing the reality behind these patterns prevents common analytical traps.
- Assuming absolute uniformity: Critics often treat Musk's family as a single monolith. In reality, naming styles split dramatically depending on the mother and the era of his life. His oldest children carry conventional names, while his relationships with counter-culture artists yielded algorithmic creations.
- Overlooking legal hurdles: Names like X Æ A-Xii face strict state-level regulatory boundaries. Assuming celebrities can register any symbol or emoji ignores vital vital-statistics laws governing birth certificates.
- Confusing public nicknames with legal names: Children like X or Y often use simplified shorthand for daily life, shielding them from administrative burdens while preserving their parents' artistic intent.
Frequently Asked Questions
How many children does Elon Musk have in total?
As of 2026, Elon Musk has 14 publicly acknowledged children across four different relationships with Justine Wilson, Grimes, Shivon Zilis, and Ashley St. Clair.
Why did X Æ A-12 change its spelling?
California state law prohibits numbers and non-alphanumeric characters on official birth certificates. The couple altered the ending to Roman numerals ("Xii") to comply with local regulations.
Do Musk's children use his last name?
Yes, most children carry the Musk surname, though some incorporate their mother's surname into hyphenated or middle-name structures depending on custody agreements and legal filings.
Are all of Elon Musk's children born naturally?
Several children, including his triplets with Justine Wilson and multiple children with Grimes, were conceived via in vitro fertilization (IVF) or born via surrogate arrangements.
