Who is Tau Techno Mechanicus Musk? Elon Musk & Grimes’ son Bio: Age, Cousins, Net Worth, Parents, Siblings, Height
Biography
Tau Techno Mechanicus Musk, commonly known by his nickname Tau, is the third child of billionaire entrepreneur Elon Musk and Canadian musician Grimes (Claire Boucher).
Born in June 1, 2022, his existence was kept private until revealed in Walter Isaacson‘s 2023 biography of Elon Musk.
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The name “Tau” refers to the Greek letter representing the mathematical constant approximately equal to twice pi (≈6.28), also nodding to Elon Musk‘s birthday on June 28.
“Techno Mechanicus” evokes themes of technology and mechanics, aligning with the couple’s futuristic naming style seen in siblings X Æ A-Xii Musk and Exa Dark Sideræl Musk.
| Elon Musk’s son | |
| Tau Techno Mechanicus Musk | |
|---|---|
 | |
| Wiki Facts & About Data | |
| Real Name: | Tau Techno Mechanicus Musk |
| Stage Name: | Tau |
| Born: | 1 June 2022 (age 3 years old) |
| Place of Birth: | California, United States |
| Nationality: | American |
| Education: | N/A |
| Height: | N/A |
| Parents: | Elon Musk, Grimes |
| Siblings: | X Æ A-Xii Musk, Exa Dark Sideræl Musk, Vivian Jenna Wilson, Griffin Musk, Kai Musk, Saxon Musk, Damian Musk, Nevada Alexander Musk, Strider Musk, Azure Musk, Arcadia Musk, Seldon Lycurgus Musk, Romulus Musk |
| Spouse: | Not Married |
| Girlfriend • Partner: | Not Dating |
| Children: | N/A |
| Occupation: | Celebrity Child |
| Net Worth: | $50 million (USD) |
Early Life & Background
Tau Techno Mechanicus Musk, commonly nicknamed Tau, is the third child of Elon Musk and Grimes (Claire Elise Boucher). He was born on June 1, 2022, via surrogate in California, United States, given his parents’ residences at the time.
His existence remained private until it was revealed in Walter Isaacson‘s 2023 biography of Elon Musk. The name Tau draws from the Greek letter representing the mathematical constant approximately twice pi (about 6.28), which aligns with his father’s birthday on June 28, and Techno Mechanicus evokes themes of technology and machinery, fitting the unconventional naming pattern shared with his full siblings.
Tau‘s ethnic background is diverse, blending his father’s South African roots with British, Pennsylvania Dutch, German, Swiss, and Canadian ancestry, and his mother’s French Canadian (Québécois), Ukrainian, and Italian descent, resulting in a predominantly European heritage incorporating Northern, Eastern, and North American elements.
Tau is a Christian. His father, raised Anglican, now identifies as non-religious or an atheist, while his mother was brought up Roman Catholic, though her current beliefs are not specified.
His parents are Elon Musk, born June 28, 1971, in Pretoria, South Africa, a billionaire entrepreneur heading companies like Tesla, SpaceX, and xAI, holding South African, Canadian, and U.S. citizenship, and Grimes, born March 17, 1988, in Vancouver, Canada, a musician, singer, songwriter, and visual artist. The pair started dating in 2018, semi-separated around 2021, and continue co-parenting.
Tau has two full siblings from his parents’ relationship: an older brother X Æ A-Xii Musk, born May 4, 2020, originally named X Æ A-12 Musk, and an older sister, Exa Dark Sideræl Musk, born December 2021 via surrogate and nicknamed Y.
He also has numerous half-siblings from his father’s other relationships, making Elon Musk the father of 14 known living children.
From Elon Musk‘s first marriage to Justine Wilson (Justine Musk) come twins Griffin Musk and Vivian Jenna Wilson, both born in 2004, with Vivian transgender and using her mother’s surname, and triplets Kai Musk, Saxon Musk, and Damian Musk, born in 2006; their first child, Nevada Alexander Musk, passed away in 2002 at 10 weeks old.
With Neuralink executive Shivon Zilis, there are twins Strider Musk and Azure Musk, born in November 2021, daughter Arcadia Musk, born in February 2024, and son Seldon Lycurgus Musk, born in early 2025.
With conservative influencer Ashley St. Clair comes son Romulus Musk, born September 2024.
Tau‘s cousins are from his parents’ broader families, though information is limited due to privacy concerns. On his father’s side, uncles Kimbal Musk, who has three children, and Tosca Musk, who has two, provide potential cousins, along with possible others from extended relatives.
On his mother’s side, uncle Mac Boucher and step-uncles from her stepfather’s family exist, but details about any children are scarce.
At 3 years old, Tau has not started formal education. No information about preschool or early programs is available, in line with the family’s privacy approach. His father has created experimental schools such as Ad Astra and Astra Nova for older children, but whether Tau will participate in similar setups remains unknown.
Career
Tau Techno Mechanicus Musk, nicknamed Tau and born on June 1, 2022, is currently 3 years old. As a young child, he has no career or professional pursuits to date.
Raised largely in privacy by his parents, Elon Musk and Grimes, Tau remains out of the public spotlight, with no reported achievements, jobs, or public activities beyond his early childhood.
His parents have emphasized protecting their younger children from media attention, so details about his daily life or future plans are not publicly available.
Personal Life
Tau Techno Mechanicus Musk, nicknamed Tau, was born on June 1, 2022, making him 3 years old.
As a young child, Tau has no wife, marriages, children, or dating history. He is not known to have been measured publicly for height, and no such details have been shared by his parents, Elon Musk and Grimes, who maintain strict privacy around their younger children.
Net Worth
Tau Techno Mechanicus Musk, nicknamed Tau and born on June 1, 2022, is a 3-year-old child whose net worth is estimated at $50 million.
As a minor with no independent income or assets, this figure reflects potential trust funds, gifts, and indirect benefits from his family’s vast resources, primarily tied to his father Elon Musk‘s wealth.
No public details confirm specific allocations like inheritance or holdings for Tau, and Elon Musk has emphasized that his children must earn significant company roles through merit rather than automatic entitlement.
Speculative sources attribute varying amounts to celebrity children in similar positions, but exact figures remain undisclosed due to the family’s focus on privacy for younger members.
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