10 Sons And 4 Mothers: Unraveling The Full List Of Elon Musk's Children's Names In 2025
As of December 2025, the public fascination with the personal life of billionaire entrepreneur Elon Musk has reached a new peak, driven by the sheer size and complexity of his growing family. With the recent confirmation of a total of 14 children with four different partners—Justine Wilson, Grimes, Shivon Zilis, and Ashley St. Clair—the names of his sons, in particular, have become a global talking point, often sounding more like cryptic codes or characters from a science fiction epic than traditional monikers.
The most current and comprehensive breakdown reveals that the Tesla and SpaceX CEO is the father of 10 sons, each with a name that carries a unique story, from mythological origins to complex alphanumeric sequences. This is the definitive, updated guide to every son in the expanding Musk dynasty, including the latest additions, Romulus and Seldon Lycurgus, whose names were only recently revealed to the world.
The Complete Roster: All of Elon Musk's Sons and Their Mothers
Elon Musk's family tree is a complex narrative spanning two decades, multiple relationships, and a tragic loss. The following list details all 10 of his sons in chronological order, providing a biographical profile for each.
- Nevada Alexander Musk (Son of Justine Wilson)
- Born: May 2002
- Status: Tragically died at 10 weeks old from Sudden Infant Death Syndrome (SIDS).
- Griffin Musk (Twin, Son of Justine Wilson)
- Born: April 2004
- Details: Named after a mythological beast, he is the twin of Vivian Jenna Wilson.
- Kai Musk (Triplet, Son of Justine Wilson)
- Born: 2006
- Details: One of the triplets, born via IVF, alongside his brothers Saxon and Damian.
- Saxon Musk (Triplet, Son of Justine Wilson)
- Born: 2006
- Details: Part of the triplet set, his name is a nod to ancient Germanic culture.
- Damian Musk (Triplet, Son of Justine Wilson)
- Born: 2006
- Details: The third of the triplets, the five sons with Justine Wilson were born between 2002 and 2006.
- X Æ A-Xii Musk (Son of Grimes, formerly X Æ A-12)
- Born: May 4, 2020
- Nickname: "X"
- Details: The most famous name, changed due to California law prohibiting numbers in a legal name.
- Strider Zilis Musk (Twin, Son of Shivon Zilis)
- Born: November 2021
- Details: Born just weeks before his half-sister Exa Dark Sideræl Musk, he is the twin of his sister Azure.
- Techno Mechanicus Musk (Son of Grimes)
- Born: June 2022
- Nickname: "Tau"
- Details: His existence and name were revealed in Walter Isaacson's biography of Elon Musk.
- Romulus Musk (Son of Ashley St. Clair)
- Born: September 2024
- Details: The most recent son confirmed, whose name was revealed in early 2025.
- Seldon Lycurgus Musk (Son of Shivon Zilis)
- Born: The birth date is not specified, but his name was recently announced as the 14th child.
- Details: The fourth child with Neuralink executive Shivon Zilis, his middle name is a reference to a legendary Spartan lawgiver.
Decoding the Techno-Babble: The Names from Grimes
The children Elon Musk shares with musician Grimes (Claire Boucher) are arguably the most famous, due to their highly unconventional and futuristic names. These names are not just random letters and numbers; they are complex entities that reflect the couple's shared interest in technology, aviation, and abstract concepts.
The eldest, X Æ A-Xii, initially named X Æ A-12, had to be legally adjusted because California law does not permit numerals in a birth name. Grimes offered a detailed explanation of the name’s components:
- X: The unknown variable.
- Æ: The elven spelling of 'Ai' (artificial intelligence) or 'love'.
- A-Xii: A nod to the Lockheed A-12 Archangel, the precursor to the SR-71 Blackbird, which the parents consider the "greatest plane ever." The 'A' also stands for "Archangel," Grimes' favorite song.
The second son, Techno Mechanicus, nicknamed Tau, continues this trend of blending technology and esoteric concepts. Born in June 2022, the name is a clear reference to mechanical and electronic themes. "Techno" likely references the electronic music genre, while "Mechanicus" suggests a deep affinity for engineering and machinery, perfectly aligning with Musk's work at SpaceX and Tesla. The nickname 'Tau' (often associated with the Greek letter $\tau$) is a simple, elegant counterpoint to the complexity of his full name.
The Newest Musk-eteers: Romulus and Seldon Lycurgus
The most recent additions to the Musk family, Romulus and Seldon Lycurgus, have brought the total count of children to 14, making headlines in late 2024 and early 2025. These names signal a shift from the techno-futurism of the Grimes children toward classical and mythological origins, a common theme in the naming convention of the Musk Dynasty.
Romulus Musk, the son of conservative journalist Ashley St. Clair, was born in September 2024. The name Romulus is steeped in Roman mythology, translating to "Citizen of Rome." He is famously the twin brother of Remus and the legendary founder of the city of Rome, a figure of great power and foundational importance—a fitting, if heavy, name for the son of a major tech founder.
Meanwhile, the fourth child with Neuralink executive Shivon Zilis, a son named Seldon Lycurgus, was confirmed as the 14th child. The name Seldon is less common, but the middle name, Lycurgus, is a profound historical reference. Lycurgus was the legendary lawgiver of Sparta, credited with establishing the military-oriented reforms that transformed Spartan society. This choice underscores a theme of law, order, and historical power, contrasting sharply with the more abstract names of his half-siblings.
The Foundation: The Sons of Justine Wilson
Before the headlines of X Æ A-Xii, Elon Musk’s first six children were with his first wife, Canadian author Justine Wilson. This set of children laid the foundation for the family, tragically beginning with the loss of their first son, Nevada Alexander Musk, in 2002.
Following this tragedy, the couple turned to IVF, resulting in the birth of twins Griffin Musk and Vivian Jenna Wilson (born Xavier Alexander Musk) in 2004. Two years later, they welcomed triplets: Kai, Saxon, and Damian Musk. These names are more traditional, yet still carry a sense of strength and historical weight, from the mythological Griffin to the ancient Saxon and the powerful Damian. These five sons, along with their sisters, represent the first generation of the Musk family legacy.
The Legacy and Future of the Musk Dynasty
The names of Elon Musk's sons—from the traditional Griffin and Kai to the highly unique X Æ A-Xii and Techno Mechanicus—reflect a man obsessed with the future, history, and the intersection of technology and humanity. The continued expansion of his family, with the recent arrivals of Romulus and Seldon Lycurgus, ensures that the Musk family name will remain a fixture in the media for decades to come.
As the children grow up, they will undoubtedly navigate the world with monikers that are as distinctive and headline-grabbing as their father's ventures at Neuralink, The Boring Company, and the pursuit of colonizing Mars. The sheer variety in their names—drawing from Greek mythology, Roman history, advanced mathematics, and aerospace engineering—creates a unique topical authority around the family, cementing their place as one of the most talked-about dynasties in the modern era.
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