Elon Musk's phenomenal success as an entrepreneur is hard to match, but his family is not far behind.
Members of the Musk family tree have each been successful and earned millions in their own right.
Based in South Africa, the Musk family was wealthy from the start but the credit of building an empire belongs to Elon and his siblings, with whom he is said to share a great rapport.
The billionaire's relationship with each family member has been detailed in the book, Elon Musk: Tesla, SpaceX, and the Quest for a Fantastic Future, a book on the billionaire's life and experiences.
His father, Errol Musk, is an electromechanical engineer and property developer who was once a half owner of a Zambian emerald mine.
According to a 2017 Rolling Stone profile, Elon once said his father "has a genius-level IQ".
Errol was reportedly the youngest person to earn a professional engineer's qualification in South Africa.
"We had so much money, at times we couldn't even close our safe", Errol Musk once said in an interview with Business Insider.
Elon's mother, Maye, is a dietitian and a model. She has been modelling since age 15.
From appearing on boxes of Special K cereal and the cover of Time magazine, to walking shows at New York Fashion Week, and becoming a CoverGirl spokesperson at age 69, Maye has earned fame and fortune over five decades.
She was married to Errol until 1979. After the divorce, she moved from South Africa to Canada along with her three children, where she built a business as a dietitian.
Coming from a place of privilege and being born to driven parents naturally had a deep influence on the Musk children, but they were not without their own set of challenges to overcome, as Elon has stated in some interviews.
While Elon's every move is closely watched and widely discussed by the media, little has been said about Kimbal and Tosca.
Here's a closer look at the lesser-known Musks and their business ventures.
Meet Kimbal Musk
Kimbal is a year younger than Elon. He is a restaurateur, chef, entrepreneur and philanthropist.
He is the founder of three food companies, The Kitchen Restaurant Group, a nonprofit called Big Green, and Square Roots, an urban farming company.
According to Forbes' conservative estimates, Kimbal has a net worth of about US$700 million ($974 million) as of 2021.
When he was a teenager, Kimbal moved to Canada and co-founded Zip2 with Elon.
Zip2 was an online city guide that provided content for the new online versions of The New York Times and the Chicago Tribune newspapers. It was sold in 1999 to Compaq for US$307 million ($426.57 million).
After selling Zip2, Kimbal invested in many fresh software and technology companies. He was an early investor in Elon's venture X.com, an online financial-services and email-payments company.
X.com merged with PayPal, which was acquired by eBay for $1.5 billion ($2.08 billion) in stock.
Kimbal served as the CEO of advertising network OneRiot from 2006 to 2011. It was acquired by Walmart-Labs for an undisclosed sum in September 2011.
Kimbal currently sits on the board of Tesla and SpaceX and was a major Tesla shareholder until he sold 30,000 shares worth US$25,604,000 ($35575938) in February, 2021.
In 2018, the World Economic Forum named him Global Social Entrepreneur of the Year, recognising his philanthropic efforts to "pursue an America where everyone has access to real food".
On the personal front, Kimbal has been married twice.
He was first married to Jen Lewin, with whom he created The Kitchen Restaurant Group and Big Green. They have three children together.
In 2018, he married Christiana Wyly, the daughter of ex-billionaire Sam Wyly, in an intimate ceremony in Dallas.
Meet Tosca Musk
Elon's younger sister, Tosca, is a producer and director. She is the co-founder and CEO of Passionflix, a streaming service for movies that have been adapted from romance novels.
Her net worth in 2018 was US$169.4 million ($235 million) according to Saving Advice.
Tosca studied fine arts and specialised in film studies at the University of British Columbia.
She started in the entertainment industry as a production secretary on the Discovery Channel docu-series Grand Illusions: The Story of Magic.
According to her IMDb page, she has been producing movies since 2001 and has made more than 30 films to date.
Tosca is widely recognised for having produced the pioneering video podcast TikiBar TV in 2005. Forbes Magazine named her as one of the top 100 breakout stars of internet television in 2006 for her work.
She co-founded Passionflix in 2016 and has raised more than US$4 million ($5.56) from investors, including brother Kimbal.
Tosca is a mother to twins Isabeau and Grayson.