When people search for Elon Musk baby name, they often have one particularly unusual name in mind: X Æ A-Xii, the son Musk welcomed with musician Grimes in May 2020. The name quickly became one of the most talked-about celebrity baby names in recent years. But X Æ A-Xii is only one part of a much larger family story. As of 2026, Musk has fathered at least 14 children with four women, according to recent biographical and news reports.
Musk’s children’s names range from traditional choices such as Griffin and Vivian to highly distinctive names including Exa Dark Sideræl, Techno Mechanicus, Strider Sekhar Sirius, Azure Astra Alice, Arcadia and Seldon Lycurgus. His family has continued to grow in recent years, making the question of Musk’s baby names more complicated than it first appears. Here’s what is publicly known about his children, their mothers, and the unusual names that have attracted so much attention.
Information Elon Musk’s Family at a Glance
| Detail | Verified Information |
|---|---|
| Full Name | Elon Reeve Musk |
| Born | June 28, 1971 |
| Birthplace | Pretoria, South Africa |
| Known For | Tesla, SpaceX and other technology ventures |
| Children | At least 14 children |
| Children’s Mothers | Justine Wilson, Grimes, Shivon Zilis, Ashley St. Clair |
| First Child | Nevada Alexander Musk |
| Most Famous Baby Name | X Æ A-Xii |
| Latest Publicly Reported Children | Romulus and Seldon Lycurgus |
| Family Status | Father of a large and growing family |
So, What Is Elon Musk’s Baby Name?
If the search refers to the baby name that made international headlines, the answer is X Æ A-Xii Musk. Musk and Grimes welcomed their son on May 4, 2020. They initially announced the name as X Æ A-12, but the spelling was later changed to X Æ A-Xii to comply with California naming requirements.
The name is usually pronounced approximately “X Ash A Twelve.” Musk has explained that the components have different inspirations. “X” represents an unknown variable, while “Æ” was described by Grimes as a reference connected to artificial intelligence and the word “love.” The “A-12” element referred to the Lockheed A-12 reconnaissance aircraft, although the final spelling uses the Roman numerals “XII.” Read more Nate Bargatze
X Æ A-Xii Wasn’t Musk’s First Child
Long before the unusual name became a viral topic, Musk was already a father. His first child with his then-wife Justine Wilson was Nevada Alexander Musk, who died at 10 weeks old from sudden infant death syndrome, according to biographical accounts.
Musk and Wilson later welcomed twins Griffin and Vivian, followed by triplets Kai, Saxon and Damian. The family used IVF for the twins and triplets. Vivian later legally changed her name to Vivian Jenna Wilson and adopted her mother’s surname.
These names are considerably more conventional than some of Musk’s later choices. The contrast illustrates how varied the naming traditions are across different chapters of his family life.
What Are Elon Musk and Grimes’ Children’s Names?
Musk and Grimes have three children together. Their first is X Æ A-Xii, born in 2020. Their second child is daughter Exa Dark Sideræl Musk, born via surrogate in December 2021. Their third child is Techno Mechanicus, who is also known by the nickname “Tau.” His birth became publicly known in 2023 through Walter Isaacson’s biography of Musk.
Each name reflects the couple’s interest in technology, science fiction, fantasy, and unconventional ideas. Grimes has previously discussed the meanings behind some of the names, while Musk has also explained aspects of their choices.
Among the three, X Æ A-Xii remains the most recognizable because of the extraordinary attention it received immediately after his birth. Explore more SpaceX.
Why Did Elon Musk and Grimes Choose X Æ A-Xii?
The name X Æ A-Xii combines several references rather than following a traditional naming pattern. Musk explained that the “A-12” component referred to the Lockheed A-12 aircraft, which he described as a precursor to the SR-71 Blackbird. The couple later changed the number “12” into the Roman numeral “Xii” for legal reasons.
Grimes also provided her own explanation for parts of the name. The singer has long incorporated technology, mythology, and futuristic themes into her artistic work, making the unconventional name consistent with her creative identity.
The result was a name that immediately became part of pop-culture conversation. Yet legally, the final version is X Æ A-Xii, not the originally announced X Æ A-12.
Who Are Elon Musk’s Children With Shivon Zilis?
Musk’s family expanded again through his relationship with Shivon Zilis, an executive associated with Neuralink. The pair welcomed twins in November 2021 named Strider Sekhar Sirius and Azure Astra Alice, according to recent reporting.
In 2026, Musk publicly discussed the inspiration behind their names. He said Strider was named partly after Aragorn, the Lord of the Rings character whose nickname is Strider, and partly after Indian physicist Subrahmanyan Chandrasekhar. He also connected Azure’s name to Elden Ring, a popular video game.
Zilis and Musk later welcomed two more children: Arcadia, born in February 2024, and Seldon Lycurgus.
What Does Strider’s Name Mean?
Among Musk’s newer baby names, Strider Sekhar Sirius has one of the more clearly documented explanations. Musk said the first name references Aragorn from J.R.R. Tolkien’s The Lord of the Rings, while “Sekhar” connects to physicist Subrahmanyan Chandrasekhar.
“Sirius” is also strongly associated with astronomy because Sirius is the brightest star in Earth’s night sky. However, Musk has not publicly provided a complete explanation for every component of the name.
The choice fits a broader pattern in Musk’s family naming: combining references from science, technology, fantasy, and popular culture rather than relying solely on conventional names.
What About Azure Astra Alice?
Musk and Zilis’ daughter is publicly reported as Azure Astra Alice. In a January 2026 discussion, Musk connected the name “Azure” to a powerful spell in Elden Ring. Recent reports have also referred to the child by the nickname “Comet Azure.”
The name “Astra” has an obvious celestial association, although that does not necessarily mean it was chosen specifically for that reason. Unless the parents provide a full explanation, it is better to avoid assigning meanings to individual parts of the name.
What is clear is that Azure’s name continues Musk’s pattern of choosing names that sound distinctive and evoke futuristic or fantastical imagery.
Who Is Elon Musk’s Newest Publicly Known Son?
One of Musk’s most recent children is Romulus, whose mother is Ashley St. Clair. St. Clair publicly revealed in February 2025 that she had given birth to a son she said was Musk’s child. Musk initially said he was uncertain about paternity, but later reporting stated that paternity testing confirmed he was Romulus’ biological father.
The circumstances surrounding Romulus’ birth became part of a legal dispute between Musk and St. Clair. Because the matter involves private family and custody issues, those details should be treated separately from the straightforward question of the baby’s name.
The child’s publicly reported name is Romulus, a name with strong connections to ancient Roman mythology. However, the family’s legal and personal circumstances remain more complicated than the name itself.
How Many Children Does Elon Musk Have?
As of 2026, major biographical and news sources report that Elon Musk has 14 children, counting Nevada Alexander, who died in infancy. His living children include five with Justine Wilson, three with Grimes, four with Shivon Zilis, and one with Ashley St. Clair, alongside Nevada.
That makes Musk’s family significantly larger than many readers realize. His children span multiple age groups and different stages of his personal life, from his first marriage to his more recent relationships.
The exact public record can sometimes be confusing because several children were not publicly known immediately after their births. Some names became known through court documents, biographies, or later announcements rather than traditional birth announcements.
Why Are Elon Musk’s Baby Names So Unusual?
There is no single explanation for every name Musk has chosen. His children’s names come from different parents and different periods of his life. Still, several themes appear repeatedly: science, technology, astronomy, literature, mythology, and fantasy.
X Æ A-Xii is perhaps the clearest example. Exa Dark Sideræl and Techno Mechanicus also sound distinctly futuristic, while Strider Sekhar Sirius combines literary and scientific references.
That pattern has made Musk’s family names a recurring topic of public curiosity. However, the parents themselves remain the best source for explaining their choices. Where no confirmed explanation exists, it is better to avoid turning speculation into fact.
The Growing Musk Family Keeps Attracting Attention
Elon Musk’s family has expanded significantly over the past several years, and new information has continued to emerge. His children have generally lived outside the same level of public scrutiny as their father, although some have occasionally appeared with him at public events.
The unusual names naturally attract attention, but they are only one part of the broader family story. Musk has repeatedly spoken publicly about his belief that declining birth rates pose a serious challenge to civilization, and he has linked his own large family to those views.
For readers searching Elon Musk baby name, therefore, there is no single answer beyond the famous X Æ A-Xii. Musk has chosen a wide range of names for his children, and several have become recognizable in their own right.
Elon Musk Baby Name: The Names at a Glance
| Mother | Child | Publicly Reported Name |
|---|---|---|
| Justine Wilson | First son | Nevada Alexander Musk |
| Justine Wilson | Twin son | Griffin |
| Justine Wilson | Twin daughter | Vivian Jenna Wilson |
| Justine Wilson | Triplet son | Kai |
| Justine Wilson | Triplet son | Saxon |
| Justine Wilson | Triplet son | Damian |
| Grimes | Son | X Æ A-Xii |
| Grimes | Daughter | Exa Dark Sideræl Musk |
| Grimes | Son | Techno Mechanicus |
| Shivon Zilis | Son | Strider Sekhar Sirius |
| Shivon Zilis | Daughter | Azure Astra Alice |
| Shivon Zilis | Daughter | Arcadia |
| Shivon Zilis | Son | Seldon Lycurgus |
| Ashley St. Clair | Son | Romulus |
The names and family relationships above are based on recent biographical and news reporting, although some children’s private lives remain largely out of the public eye.
Conclusion
The question “What is Elon Musk’s baby name?” usually leads people to X Æ A-Xii, one of the most recognizable unconventional celebrity baby names of the modern era. But Musk’s family story has grown considerably since that 2020 birth. He is now publicly reported to have 14 children, including Nevada Alexander, who died as an infant, with the rest born across four different relationships.
From X Æ A-Xii and Exa Dark Sideræl to Strider Sekhar Sirius, Azure Astra Alice, Seldon Lycurgus and Romulus, the names reflect a striking mix of science, technology, fantasy, literature and personal creativity. Whatever readers think of the choices, they have certainly made Musk’s family one of the most closely watched and unusually named in modern celebrity culture.
Frequently Asked Questions
What is Elon Musk’s baby’s name?
The name most commonly associated with the search is X Æ A-Xii Musk, Musk’s son with Grimes, born in May 2020.
How many children does Elon Musk have?
As of 2026, major sources report that Musk has 14 children, including his first son, Nevada Alexander, who died in infancy.
What is X Æ A-Xii’s name pronounced?
Musk and Grimes have generally referred to their son as “X” or “Lil X.” The full name is commonly rendered as X Æ A-Xii.
What does X Æ A-Xii mean?
The name incorporates references to an unknown variable, artificial intelligence or love, and the Lockheed A-12 aircraft. The final spelling was changed from A-12 to A-Xii for legal reasons.
What are Elon Musk’s other children’s names?
His children include Griffin, Vivian Jenna Wilson, Kai, Saxon, Damian, X Æ A-Xii, Exa Dark Sideræl, Techno Mechanicus, Strider Sekhar Sirius, Azure Astra Alice, Arcadia, Seldon Lycurgus and Romulus, in addition to Nevada Alexander.
Who is the mother of X Æ A-Xii?
X Æ A-Xii’s mother is musician Grimes, whose real name is Claire Boucher.
What is Elon Musk’s newest baby’s name?
One of his most recently publicly reported children’s names is Romulus, his son with Ashley St. Clair.
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