The Other Musks: 7 Shocking Secrets And Billion-Dollar Ventures Of Elon Musk's Siblings And Half-Siblings
While the world focuses on the rockets of SpaceX, the electric cars of Tesla, and the latest developments at X (formerly Twitter), the other members of the Musk family are quietly building their own empires in vastly different fields, from sustainable food to romance streaming. As of late December 2025, the siblings of the world's richest man—Kimbal and Tosca—continue to expand their influence, while new details about their complex extended family, including a number of half-siblings, keep the public spotlight firmly fixed on the entire Musk dynasty.
The story of the Musk siblings is one of shared entrepreneurial DNA, originating from their parents, Maye and Errol Musk, but diverging into unique and highly successful paths. From the co-founding of the internet company Zip2 to multi-million-dollar food and film ventures, the family's collective ambition is a fascinating study in modern wealth and influence, proving that genius and drive are not limited to a single generation.
The Complete Biography of Elon Musk's Siblings and Half-Siblings
The Musk family tree is extensive and complex, rooted in South Africa and spanning multiple marriages and relationships. Elon Musk has two full siblings, with whom he shares both parents (Maye Musk and Errol Musk), and four known paternal half-siblings from his father's subsequent relationships.
- Elon Reeve Musk (Full Sibling)
- Born: June 28, 1971, Pretoria, South Africa
- Career Highlights: Co-founder of Zip2, X.com (later PayPal), CEO of SpaceX, CEO of Tesla, Owner/CTO of X (formerly Twitter), Founder of The Boring Company and Neuralink.
- Kimbal James Musk (Full Sibling)
- Born: September 20, 1972, Pretoria, South Africa
- Career Highlights: Co-founder of Zip2, Director on the board of Tesla, Restaurateur (The Kitchen Restaurant Group, Next Door), Philanthropist (Big Green, The Musk Foundation).
- Tosca Jane Musk (Full Sibling)
- Born: July 20, 1974, Pretoria, South Africa
- Career Highlights: Filmmaker, Executive Producer, Director, Co-founder and CEO of Passionflix (a romance-focused streaming service).
- Alexandra "Ali" Musk (Paternal Half-Sibling)
- Parentage: Errol Musk and Heide Bezuidenhout
- Details: One of two daughters from Errol Musk's marriage to Heide Bezuidenhout.
- Asha Rose Musk (Paternal Half-Sibling)
- Parentage: Errol Musk and Heide Bezuidenhout
- Details: The second daughter from Errol Musk's marriage to Heide Bezuidenhout.
- Elliot Rush Musk (Paternal Half-Sibling)
- Parentage: Errol Musk and Jana Bezuidenhout (Errol's former stepdaughter)
- Born: Circa 2017
- Details: Known as Elliot Rush, his birth was a source of public controversy for the family.
- Second Child with Jana Bezuidenhout (Paternal Half-Sibling)
- Parentage: Errol Musk and Jana Bezuidenhout
- Details: A second child whose existence was confirmed by Errol Musk in 2022, adding to the complexity of the Musk family’s private life.
Kimbal Musk: The Culinary Entrepreneur and Tesla Insider
Often overshadowed by his older brother, Kimbal Musk has forged a distinct and highly successful career path that blends high-tech finance with a passion for food and sustainability. Kimbal and Elon’s shared history began in the 1990s when they co-founded their first company, Zip2, a city guide software company that was eventually sold to Compaq for over $300 million in 1999.
Kimbal’s current focus, however, is on what he calls "real food." He is the co-founder of The Kitchen Restaurant Group, which operates a number of popular farm-to-table restaurants, including The Kitchen and Next Door, primarily in Colorado and other US states. His philosophy centers on the belief that food is the new internet, a powerful vehicle for social change.
Beyond his culinary ventures, Kimbal is a major figure in the philanthropic sector. He is the co-founder of Big Green, a non-profit organization that builds "Learning Gardens" in schools across the United States, aiming to educate children about growing and eating fresh food. He also serves as a director on the board of Tesla Inc., a position that has significantly contributed to his estimated net worth, which is reported to be between $500 million and $900 million as of late 2025. His financial activity remains under scrutiny, with public filings showing he sold a significant number of Tesla shares in late 2024.
Tosca Musk and the Rise of Passionflix in 2025
The youngest of the full siblings, Tosca Musk, has carved out a niche in the entertainment industry as a successful filmmaker, producer, and director. While her brothers focused on software, space, and electric vehicles, Tosca pursued her passion for cinema, producing her first film in the early 2000s.
Her most notable and current venture is Passionflix, a subscription video-on-demand (SVOD) streaming service she co-founded in 2017. Passionflix is a highly specialized platform dedicated to adapting romance novels into feature films and series, a genre Tosca believes was underserved by mainstream Hollywood. The company's unique focus has allowed it to build a dedicated global audience, capitalizing on the massive, loyal readership of romance authors.
In a major business development for 2025, Passionflix has been expanding its production footprint. Recent reports indicate that Tosca has been strategically moving some of the company's operations to Georgia, specifically the Atlanta area, to leverage the state's growing film industry incentives and infrastructure. This move signals an aggressive push to increase the volume and quality of original content on the platform, further solidifying its standing as the "Netflix of Romance." Tosca's ability to finance, produce, and distribute a steady stream of content has made her a powerful figure in the independent streaming landscape, separate from the SpaceX and Neuralink world of her brother.
The Complex Lives of the Paternal Half-Siblings
The extended Musk family includes four paternal half-siblings from Errol Musk, Elon's father. Errol’s second wife, Heide Bezuidenhout, was a widow with two children, and the couple had two daughters together: Alexandra "Ali" Musk and Asha Rose Musk. These two half-sisters have largely maintained a private life outside the intense media scrutiny that follows the rest of the family.
The most controversial and recent additions to the family are the two children Errol Musk fathered with his former stepdaughter, Jana Bezuidenhout. Jana is the daughter of Heide Bezuidenhout, making her Elon’s former step-sister. The first child, a son named Elliot Rush Musk, was born around 2017. The second child's existence was confirmed later, further complicating the already unconventional family dynamics.
The public revelation of these half-siblings, particularly the youngest children, continues to draw attention to the highly unconventional and often turbulent personal life of the Musk patriarch, Errol Musk. While these half-siblings do not share the immediate entrepreneurial history of Zip2 or the board seats of Tesla with Elon, their existence is a persistent, if private, element of the larger Musk family narrative. This intricate web of relationships is a testament to the fact that even the world’s most powerful families have intensely private and often dramatic backstories that continue to evolve in the public eye.
The collective success of the Musk siblings—Elon, Kimbal, and Tosca—demonstrates a powerful, inherited drive to build, create, and disrupt. Whether through space exploration, sustainable food, or niche streaming services, the Musk name remains synonymous with ambition and the relentless pursuit of large-scale ventures. Their combined efforts, supported by the philanthropic work of the Musk Foundation, ensure that the family’s influence extends into nearly every facet of modern life.
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