The 14 Surprising Siblings Of Vivian Jenna Wilson: An Updated Look At The Musk Family Tree (2025)

Vivian Jenna Wilson, the eldest daughter of tech magnate Elon Musk and author Justine Wilson, has captured global attention not only for her personal journey and legal name change but also for her place within one of the world's most complex and rapidly expanding family trees. As of late 2025, the number of her siblings and half-siblings has become a topic of intense public curiosity and media speculation, a dynamic that Vivian herself has recently spoken out about.

The story of Vivian's family is far from conventional, marked by IVF, a high-profile divorce, a significant name change, and a continuously growing roster of children from multiple partners. This article dives deep into the full list of her biological siblings and half-siblings, providing the most current and updated information on the intricate web that is the Musk family.

Vivian Jenna Wilson: A Quick Biography and Personal Journey

Vivian Jenna Wilson's life has been under the microscope since her father's rise to prominence, but she truly stepped into the spotlight with a courageous and very public personal decision. Here is a brief look at the key details of her life:

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• Full Name: Vivian Jenna Wilson (formerly Xavier Alexander Musk)
• Date of Birth: April 15, 2004
• Age (as of December 2025): 21 years old
• Parents: Elon Musk and Justine Wilson (née Wilson)
• Birthplace: United States
• Name Change: Legally changed her name and gender identity in 2022. She adopted her mother’s maiden name, Wilson, a move that publicly signified her desire to cut ties with her biological father.
• Current Relationship with Father: Estranged. Court documents cited her reason for the name change as: "the fact that I no longer live with or wish to be related to my biological father in any way, shape or form."

Vivian, who has also been referred to by her middle name Jenna in early media reports, has since pursued a life largely out of the public eye, though recent interviews have shed light on her complex family dynamics and her journey as a transgender woman.

The 5 Biological Siblings: Twins and Triplets from Justine Wilson

Vivian’s core siblings—those who share both Elon Musk and Justine Wilson as parents—are five in number. All were conceived through in-vitro fertilization (IVF) due to a medical issue that prevented the couple from conceiving naturally after the birth of their first son, Nevada Alexander Musk, who tragically died of Sudden Infant Death Syndrome (SIDS) at 10 weeks old.

Griffin Musk: The Twin Brother

Vivian and Griffin are twins, born on the same day, April 15, 2004. Griffin Musk, like his twin sister, has generally maintained a private life away from the media frenzy surrounding their father. He is often noted for his efforts to combine his creative and analytical sides, suggesting a focus on his own career path. The twins are the eldest surviving children of Elon Musk.

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Kai, Saxon, and Damian Musk: The Triplets

Two years after the twins, Justine and Elon welcomed a set of triplets in 2006: Kai Musk, Saxon Musk, and Damian Musk. They are currently in their late teens and, similar to their older twin siblings, have largely avoided the public spotlight. Their mother, Justine Wilson, maintains shared custody and has focused on providing a stable, private life for her children away from the billionaire's chaotic world.

The Expanding Roster of Half-Siblings and the 'New' Baby News

The most complex and intriguing aspect of Vivian Jenna Wilson's family is the ever-growing number of half-siblings she has from her father's subsequent relationships. Due to the high-profile nature of her father's personal life, the family tree is constantly evolving, a fact that Vivian has openly admitted makes it difficult to keep track of.

Half-Siblings from Grimes (Claire Elise Boucher)

Vivian has three half-siblings from her father's relationship with Canadian musician Grimes:

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• X Æ A-Xii (born 2020): Known as "X," he is the first child of Elon Musk and Grimes.
• Exa Dark Sideræl (born 2021): Known as "Y" or "Exa," she was born via surrogate.
• Techno Mechanicus (born 2023): Known as "Tau," his existence was revealed in Walter Isaacson's 2023 biography of Elon Musk.

Half-Siblings from Shivon Zilis

Vivian also has twins from her father's professional relationship with Neuralink executive Shivon Zilis. These children were born in November 2021, just weeks before his second child with Grimes was born:

• Strider (born 2021)
• Azure (born 2021)

The Latest Additions and Vivian's Surprising Revelation (2025 Update)

The most recent reports, including updates from early 2025, suggest that the number of children attributed to Elon Musk is now 14 (including his late son, Nevada). The newest reported additions include:

• An unnamed child with Ashley St. Clair (born September 2024): Conservative journalist Ashley St. Clair announced in February 2025 that she had given birth to a child by Musk.
• Seldon Lycurgus Musk (born February 28, 2025): A child reportedly born to Shivon Zilis.

The truly unique and fresh angle on the topic of Vivian Jenna Wilson’s siblings is her own admission about the difficulty of tracking her growing family. In a candid public statement in March 2025, Vivian revealed that she learned about the potential existence of a new half-sibling not through a private family conversation, but through social media and news reports. This highlights the severe estrangement and lack of communication within the family, where a daughter of the world's richest man is left to piece together her own family tree from public announcements.

This situation underscores the emotional and logistical complexity of being a part of the extended Musk family. While the total number of her half-siblings continues to grow, Vivian Jenna Wilson remains focused on her own life and identity, a journey she has bravely undertaken on her own terms, separate from her father's enormous shadow.