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8 Outlandish Names: The Complete List Of Elon Musk’s Sons And The Shocking Meaning Behind 'Techno Mechanicus'

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The names of Elon Musk’s children have become a global fascination, representing a unique blend of high-tech futurism, pop culture, and classical references that only the world's wealthiest man and one of its most eccentric thinkers could conceive. As of today, December 23, 2025, the Tesla and SpaceX CEO is the father of 14 children with four different women, and the names of his sons, in particular, range from the classically traditional to the utterly outlandish, capturing headlines with every announcement.

The latest revelations, particularly the existence and name of his youngest son with musician Grimes, have solidified Musk's reputation for unconventional choices, sparking both curiosity and debate across the internet. This deep dive uncovers the complete, updated list of Elon Musk's sons, the mothers of each child, and the fascinating, often complex, meanings behind their legendary names.

The Musk Dynasty: A Complete Profile of Elon Musk’s Sons

Elon Musk has fathered 14 children with four women: Canadian author Justine Wilson, musician Grimes (Claire Boucher), and Neuralink executive Shivon Zilis. The list below focuses on the names of his sons, who span two decades of his life.

  • Nevada Alexander Musk (Son with Justine Wilson)
    • Born: 2002
    • Status: Tragically died of Sudden Infant Death Syndrome (SIDS) at 10 weeks old.
  • Griffin Musk (Twin with Justine Wilson)
    • Born: 2004
    • Note: Twin to Vivian Jenna Wilson (formerly Xavier).
  • Kai Musk, Saxon Musk, and Damian Musk (Triplets with Justine Wilson)
    • Born: 2006
    • Note: Conceived via IVF following the loss of Nevada Alexander.
  • X Æ A-Xii Musk (Son with Grimes)
    • Born: May 2020
    • Original Name: X Æ A-12, changed to comply with California state law which prohibits the use of numbers in a legal name.
  • Strider Sekhar Sirius Musk (Twin with Shivon Zilis)
    • Born: November 2021
    • Note: Twin to Azure Astra Alice. The name 'Strider' is a clear reference to the alias of the character Aragorn from J.R.R. Tolkien's The Lord of the Rings.
  • Tau Techno Mechanicus Musk (Son with Grimes)
    • Born: June 2022 (existence revealed in 2023)
    • Nickname: Tau
    • Note: His full name was revealed in Walter Isaacson’s authoritative biography of the tech mogul.

Unpacking the Code: X Æ A-Xii and Its Pronunciation

The birth of his first child with Grimes in 2020 instantly created a global stir, not because of the parents, but because of the name: X Æ A-12. The name was later legally changed to X Æ A-Xii to comply with California law, which allows only letters of the alphabet, with the exception of apostrophes or hyphens, to be used in a legal name. The Roman numerals ‘Xii’ (12) were a clever workaround.

What Does X Æ A-Xii Mean?

The name is a complex blend of mathematical, technological, and cultural references, as explained by the parents:

  • X: Represents the unknown variable.
  • Æ: The elven spelling of ‘Ai’ (Artificial Intelligence and/or love). Grimes confirmed the 'ash' pronunciation.
  • A-Xii: A reference to the Lockheed SR-71 Blackbird’s predecessor, the Archangel-12 (A-12), which Musk called "the coolest plane ever."

How to Pronounce X Æ A-Xii

The pronunciation is arguably the most confusing part of the name. Elon Musk himself clarified the pronunciation during a podcast appearance, stating that the name is pronounced as "X Ash A Twelve." The 'X' is spoken like the letter, the 'Æ' is pronounced 'Ash,' and the 'A-Xii' is simply 'A Twelve.'

The Shocking Revelation: Tau Techno Mechanicus

The most recent and perhaps most esoteric name is that of his third child with Grimes, a son named Tau Techno Mechanicus. The child's existence was kept private until it was revealed in Walter Isaacson's 2023 biography of Elon Musk. This name firmly places the child in the realm of advanced mathematics and science fiction.

The Meaning of Tau Techno Mechanicus

The name is a powerful fusion of scientific concepts and futuristic terminology, which offers a deep look into the intellectual pursuits of his parents:

  • Tau (τ): The child’s nickname, Tau, is the 19th letter of the Greek alphabet. In mathematics, the symbol is often used to represent the value of $2\pi$ (approximately 6.28), a constant that some mathematicians argue is more fundamental than Pi ($\pi$). It is a key entity in advanced engineering and physics.
  • Techno Mechanicus: This part of the name is a clear nod to the world of technology and mechanical engineering. It strongly evokes the concept of a 'Machine God' or 'Spirit of the Machine,' a concept that resonates deeply with Musk's work at SpaceX and Tesla. The term "Mechanicus" itself is a powerful entity, particularly in sci-fi and gaming culture, suggesting a master of technology and robotics.

The choice of Techno Mechanicus signals a profound interest in the intersection of humanity and machinery, a theme central to many of Musk’s ventures, including the development of Neuralink. The name is a statement about the future of technology and the role his children will play in it, far surpassing a simple personal preference.

The Traditional and the Tragic: Sons with Justine Wilson

Before the unconventional names with Grimes, Elon Musk’s first marriage to Justine Wilson produced five sons with more traditional names, though their family history is marked by tragedy and resilience.

The couple's first son, Nevada Alexander Musk, sadly passed away from SIDS at just ten weeks old. This devastating loss led the couple to use IVF to conceive their subsequent children.

Their first successful IVF attempt resulted in the twins, Griffin Musk and Vivian Jenna Wilson (formerly Xavier). Griffin’s name is a classic, strong choice, a stark contrast to the names of his younger half-siblings. Two years later, the couple welcomed triplets: Kai Musk, Saxon Musk, and Damian Musk. These names are also strong, traditionally rooted names, completing the list of sons from his first marriage.

Strider Sekhar Sirius: The Literary and Celestial Nods

In 2021, Musk welcomed twins with Neuralink executive Shivon Zilis. One of the twins is a son named Strider Sekhar Sirius. This name continues the trend of incorporating deep, meaningful, and often literary or celestial entities.

  • Strider: As noted, this is a direct reference to the alias of Aragorn, a key character in J.R.R. Tolkien's epic fantasy, The Lord of the Rings. This reveals a shared interest in epic fantasy and heroic narratives.
  • Sirius: This is the brightest star in the night sky and a key entity in astronomy, linking back to Musk's work with SpaceX and his vision for space colonization.

The names of Elon Musk's sons are more than just monikers; they are a public ledger of his philosophical and technological interests. They serve as a fascinating exploration of science, mythology, mathematics, and the future of human-machine interaction, ensuring that the legacy of the Musk dynasty will continue to generate discussion for decades to come.

what is elon musk's son's name
what is elon musk's son's name

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