The 14 'Musk-eteers': A Complete List Of Elon Musk's Children, Their Unique Names, And The Four Mothers (Updated 2025)

As of late 2024 and early 2025, the world's most prolific father in the tech industry, Elon Musk, is confirmed to be a father to 14 children. This sprawling, unconventional family unit—which has been dubbed the "Musk-eteers"—continues to grow, prompting global curiosity about the names, the mothers, and the sheer logistics of managing such a large, high-profile family. The most recent news, revealed in February 2025, confirmed the birth of his 14th child, Romulus, with conservative journalist Ashley St. Clair, adding another layer of intrigue to the already complex family biography. This article provides the most current and comprehensive breakdown of every child in the Musk family, detailing the unique and often futuristic names, the four mothers who share the journey of parenthood with the Tesla and SpaceX CEO, and the deeper meanings behind the names that often pay homage to science, technology, and mythology.

The Complete Biography of Elon Musk's 14 Children and Their Mothers

Elon Musk's journey into fatherhood spans two decades, beginning with his first wife, Canadian author Justine Wilson, and continuing with musician Grimes (Claire Boucher), Neuralink executive Shivon Zilis, and most recently, Ashley St. Clair. The children's names range from traditional to the highly conceptual, reflecting Musk's affinity for science fiction and technological innovation.

• Mother: Justine Wilson (5 Children)
  • Nevada Alexander Musk: Born 2002. Tragically passed away from SIDS at 10 weeks old.
  • Griffin Musk: Twin, born 2004.
  • Vivian Jenna Wilson: Twin, born 2004. Legally changed her name in 2022 to adopt her mother's surname.
  • Kai Musk: Triplet, born 2006.
  • Saxon Musk: Triplet, born 2006.
  • Damian Musk: Triplet, born 2006.
• Mother: Grimes (Claire Boucher) (3 Children)
  • X Æ A-12 Musk (X): Son, born May 2020. Name later legally changed to X Æ A-Xii.
  • Exa Dark Sideræl Musk (Y): Daughter, born December 2021 via surrogate.
  • Techno Mechanicus Musk (Tau): Son, born 2022. Revealed in Walter Isaacson’s 2023 biography.
• Mother: Shivon Zilis (5 Children)
  • Strider Sekhar Sirius Zilis: Twin, born November 2021.
  • Azure Astra Alice Zilis: Twin, born November 2021.
  • Arcadia Musk: Child, born 2023 (Details are private, but confirmed to be part of the 14).
  • Seldon Musk: Child, born 2023 (Details are private, but confirmed to be part of the 14).
  • Techno Musk (Unconfirmed Name/Second Set of Twins or Triplets): There is some confusion in the media regarding the exact names and number of the Zilis children post-Strider and Azure. Some sources list two more children, Arcadia and Seldon, bringing the total to 14.
• Mother: Ashley St. Clair (1 Child)
  • Romulus St. Clair: Son, born September 2024. Publicly revealed in February 2025.

Deconstructing the Mind-Bending Names: X Æ A-12, Exa Dark Sideræl, and Techno Mechanicus

The names of Musk's children with Grimes, in particular, have become a global phenomenon, sparking countless articles and discussions about their pronunciation and meaning. These names are not random; they are deeply rooted in mathematics, space exploration, and futuristic concepts, providing a fascinating glimpse into the minds of both parents.

X Æ A-Xii (Pronounced 'X Ash A Twelve')

The first child the couple welcomed, initially named X Æ A-12, was later slightly altered to X Æ A-Xii to comply with California law, which restricts the use of numbers in names. The meaning, as explained by Grimes, is a complex fusion of abstract concepts and technology.

• X: Represents "the unknown variable."
• Æ: Is the Elven spelling of "AI," which stands for artificial intelligence and/or "love."
• A-Xii: Refers to the Archangel-12, the couple’s favorite aircraft, which is a precursor to the SR-71 Blackbird. The 'A' also stands for 'Archangel,' her favorite song.

Exa Dark Sideræl Musk (Y)

Their second child, a daughter, was given the equally unique name Exa Dark Sideræl, affectionately nicknamed "Y." This name is a deep dive into the realms of supercomputing, cosmology, and fantasy.

• Exa: A reference to the supercomputing term "exaFLOP," which is a unit of computer performance.
• Dark: Refers to "dark matter," the mysterious, invisible substance that makes up the majority of the universe's mass.
• Sideræl: Pronounced "sigh-deer-ee-elle," this is described as a "more elven" spelling of 'sidereal,' meaning relating to or determined by the stars.

Techno Mechanicus Musk (Tau)

The third child with Grimes, Techno Mechanicus, or "Tau," continues the trend of blending technology and abstract concepts. The name was revealed in the biography written by Walter Isaacson. 'Tau' is a Greek letter often used in physics and mathematics, symbolizing a constant, while 'Mechanicus' clearly points toward mechanics and engineering—a nod to Musk's companies like Tesla and SpaceX. The name reinforces the family's deep connection to the future of science and engineering.

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The Growing Neuralink Family: Strider, Azure, and the Zilis Twins

Elon Musk's relationship with Neuralink executive Shivon Zilis has resulted in five children, including a set of twins born in November 2021, just weeks before Grimes and Musk welcomed their second child via surrogate. The names of the 2021 twins are Strider Sekhar Sirius and Azure Astra Alice, names that carry a celestial and mythological weight. The names Strider and Azure are a beautiful juxtaposition of earthly and cosmic entities. 'Strider' is a clear reference to the character Aragorn's alias in J.R.R. Tolkien’s The Lord of the Rings, a nod to fantasy literature. 'Azure' refers to a bright blue color, often associated with the sky, adding a sense of cosmic openness. The middle names, Sekhar Sirius and Astra Alice, further connect the children to the stars (Sirius is the brightest star in the night sky; Astra means 'star'). The subsequent children with Zilis, Arcadia and Seldon, whose details remain highly private, continue this theme. 'Arcadia' evokes a vision of pastoral harmony and utopia, while 'Seldon' is a name that appears in Isaac Asimov’s classic science fiction series, Foundation, a favorite of Musk's. This use of names from classic science fiction and fantasy is a consistent pattern, demonstrating the influence of speculative fiction on the Musk family's naming conventions.

The Newest Addition: Romulus St. Clair and the Future of the Musk Family

The latest public revelation about the Musk family came in early 2025 with the announcement of his 14th child, a son named Romulus, with conservative influencer and journalist Ashley St. Clair. The baby was reportedly born in September 2024. The name Romulus is instantly recognizable as one of the twin founders of Rome in Roman mythology. According to the legend, Romulus and his twin brother, Remus, were raised by a she-wolf and went on to establish the city of Rome. This choice of name, drawn from classical mythology, is a distinct departure from the high-tech, futuristic names given to his children with Grimes and Zilis, and the traditional names with Justine Wilson. It instead leans into the idea of founding, legacy, and historical significance.

The Topical Authority of the Musk Family

The continuous growth and unique naming choices of the Musk family keep the topic in the spotlight, driving topical authority around several key entities:

• Parenthood in the Age of AI: The names X Æ A-Xii and Exa Dark Sideræl spark conversations about the intersection of human life and advanced technology.
• Celebrity Baby Names: The Musk children's names are frequently cited in discussions about the most unique and unconventional celebrity children's names, alongside the likes of Apple Martin or Pilot Inspektor.
• The Legacy of IVF and Surrogacy: The use of IVF for the triplets and surrogacy for Exa Dark Sideræl highlights the modern pathways to parenthood for high-profile individuals.
• The Role of the Mothers: The four mothers—Justine Wilson, Grimes (Claire Boucher), Shivon Zilis, and Ashley St. Clair—each represent a different chapter in Musk's life, and their co-parenting dynamic is a subject of intense public interest.

The Musk family, with its 14 members and a tapestry of names that span from Roman mythology to supercomputing, remains one of the most intriguing and rapidly evolving stories in the public eye. Each new name is a carefully chosen reference, a piece of a larger, futuristic narrative that only Elon Musk could author.