The X-Files: 5 Shocking Facts About Elon Musk's Son X Æ A-Xii (Age 5 In 2025)

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The child with the most talked-about name in the world, X Æ A-Xii Musk, turned 5 years old in 2025, marking another year of living under the intense global spotlight cast by his billionaire father, Elon Musk, and his musician mother, Grimes. Born on May 4, 2020, the boy, affectionately known as 'X,' continues to be a focal point of public curiosity, especially as his family dynamic expands—now with 14 known children in the Musk family as of early 2025. This article dives into the most current and unique details about X Æ A-Xii, from the legal name change to his most recent public life updates.

X Æ A-Xii Musk: Full Biography and Profile (Updated 2025)

The son of one of the world's richest men and a visionary music artist, X Æ A-Xii's life was destined to be anything but ordinary. His birth announcement immediately sparked a global conversation, not only because of his parents but also due to his highly unconventional name.

  • Full Name: X Æ A-Xii Musk (Legal name, originally X Æ A-12)
  • Nickname: X, Lil X
  • Date of Birth: May 4, 2020
  • Current Age (as of December 2025): 5 years old
  • Birthplace: Los Angeles, California
  • Parents: Elon Musk (Father), Grimes (Claire Elise Boucher) (Mother)
  • Siblings (Shared with Grimes): Exa Dark Sideræl Musk (Sister, nicknamed 'Y'), Techno Mechanicus (Brother, nicknamed 'Tau')
  • Total Siblings (Musk Family, as of 2025): 13 others, including the latest son Seldon Lycurgus born in February 2025 with Shivon Zilis.
  • Father's Companies: Tesla, SpaceX, X (formerly Twitter), xAI, The Boring Company, Neuralink

The initial name, X Æ A-12, had to be legally modified from the numeral '12' to the Roman numeral 'Xii' to comply with California state law, which only permits the 26 letters of the English alphabet in a name.

Decoding the Name: X Æ A-Xii's Cryptic Meaning and Pronunciation

The name X Æ A-Xii is a blend of technology, aviation history, and Elven linguistics, reflecting the unique interests of both Elon Musk and Grimes. Understanding the components is key to grasping the curiosity surrounding the child.

The Meaning Behind Each Character

Grimes, the child's mother, has publicly explained the meaning of the three distinct parts of the name:

  • X: Represents "the unknown variable." This aligns with Musk's fascination with the unknown and his companies' "X" branding.
  • Æ: This ligature is the Elven spelling of "AI" (Artificial Intelligence) and is often pronounced 'Ash.' It also translates to "love" in some languages.
  • A-Xii (or A-12): This is arguably the most specific part, referring to the Lockheed A-12 Archangel, the precursor to the SR-71 Blackbird. Musk called it the "favorite aircraft" of both him and Grimes, noting it is "great in battle, but non-violent." The 'A' also stands for 'Archangel,' which is Grimes' favorite song.

The Conflicting Pronunciation

Adding to the mystery, the parents themselves have offered slightly different pronunciations, leading to further public confusion.

  • Elon Musk's Pronunciation: "X Ash Twelve" (Ex-Ash-Twelve). He stated, "It's just X, the letter X. And then, the Æ is pronounced 'Ash'... and then A-12 is my contribution."
  • Grimes' Pronunciation: "Ex-AI" (Ex-Ay-Eye). She explained, "It's just X, like the letter X. Then AI. Like how you said the letter A then I."

Regardless of the official pronunciation, the child is most often referred to simply as "X" in public, simplifying the complexity for everyone involved.

Life in the Spotlight: X's Most Recent Public Appearances (2025)

Despite their unusual family life, Elon Musk has frequently brought X Æ A-Xii to high-profile events, offering the public rare glimpses into the life of the young boy. These appearances often go viral, highlighting the child's involvement in his father's world of technology and politics.

The Oval Office Visit (February 2025)

In one of the most recent and surprising public events, X Æ A-Xii accompanied his father on a visit to the Oval Office in February 2025. The visit was to witness President Donald Trump sign an executive order. Photos from the event showed 'X' standing next to his father, dressed in a suit, a testament to the extraordinary environments the young boy is exposed to.

The Tesla and SpaceX Influence

X is often seen at his father’s work sites. Musk has previously stated that he brings his children to his companies, such as SpaceX and Tesla, to expose them to the technical and engineering world. This early exposure to complex concepts like rocket science and AI aligns with the intellectual theme embedded in X's name. The child's presence at these high-stakes locations confirms his unconventional upbringing compared to other celebrity children.

The Expanding Musk Family: X's Siblings and the 2025 Update

X Æ A-Xii is not an only child. In fact, he is one of 14 known children of Elon Musk, a number that continues to grow, drawing significant media attention.

Siblings Shared with Grimes

X has two younger siblings with his mother, Grimes (Claire Elise Boucher):

  • Exa Dark Sideræl Musk ('Y'): Born via surrogate in December 2021. Her name is equally complex, referencing Exa (a supercomputing term), Dark (the unknown), and Sideræl (a more "elven" spelling of sidereal, relating to the stars).
  • Techno Mechanicus ('Tau'): The third child of the couple, whose birth was revealed in September 2023. His nickname, 'Tau,' is a nod to the Greek letter and mathematical constant.

The Larger Musk Brood (14 Children in 2025)

As of early 2025, X Æ A-Xii is part of a very large family. Elon Musk shares children with three other women:

  • Justine Wilson: Five children, including twins Vivian Jenna Wilson and Griffin Musk, and triplets Kai, Saxon, and Damian Musk.
  • Shivon Zilis: Twins Strider and Azure, born in 2021, and a fourth child, Seldon Lycurgus, whose birth was announced in February 2025.
  • Ashley St. Clair: One publicly known child.

The sheer size of the family, with 14 children spanning from age 20 down to a few months old, makes the Musk family a unique case study in modern parenthood, with X Æ A-Xii sitting right in the middle of the generational spread.

The Legacy of the Name and Future Predictions

The name X Æ A-Xii is more than just a quirky choice; it's a statement about a futuristic, technology-driven world. It encapsulates the ethos of his parents—a blend of science fiction, aerospace, and cutting-edge technology.

As X Æ A-Xii continues to grow, his unique name and public visibility will undoubtedly keep him in the public eye. Now at age 5, he is transitioning from a toddler to a young child, and observers are keenly watching to see if he will follow in his father's footsteps in the world of technology and entrepreneurship, or perhaps his mother's path in music and art. His early exposure to world leaders and complex scientific environments suggests a future where he is well-prepared for a life of influence and innovation, regardless of the path he chooses. The name "X" truly represents the "unknown variable" that his future holds.

elon musk child x æ a-12 age
elon musk child x æ a-12 age

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