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The richest man in the world, Elon Musk, has been prolific and multiplied.
The tech icon has 10 children by three women – including twins born last year.
Musk, 51, and the top executive of one of his companies, Siobhan Zillis, welcomed the two new members of their family in November in Austin, Texas, Insider revealed.
The news site reported that in April, Musk and Zilis, 36, filed a petition to give the twins their father’s last name and their mother’s last name as part of their middle names.
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Billionaire Elon Musk, the richest man in the world, has 10 children from three women. (Mike Blake/Reuters)
The Twitter-hungry billionaire appeared to confirm their birth in a tweet, sparking renewed interest in the expanding family tree.
“I’m doing everything I can to help the underpopulation crisis. Collapsing birthrates are the greatest danger civilization has ever faced,” Musk wrote on Twitter.
This brings the South African-born business mogul’s number of confirmed children to 10 – six by his first wife Justine Wilson, two by Claire Boucher, also known by her stage name Grimes, and the Zillis twins.
Musk and Wilson’s first child, born in 2002, died of sudden infant death syndrome at 10 weeks old, according to Marie Claire.
Grimes’ second child with Musk, a daughter born via surrogate, arrived weeks after Zilis gave birth to her twins.
Siobhan Zillis
Zilis has worked for Musk’s companies for years. She is director of operations and special projects at Neuralink, according to her LinkedIn profile.
The company, co-founded by Musk, develops computer interfaces that help people with neurological diseases turn their thoughts into actions.
A photo combo of Siobhan Zilis, who welcomed twins with Elon Musk in November 2021 (Instagram/Twitter)
News of their twins’ arrival is the first time the two have been romantically linked, but Zilis, an artificial intelligence expert, defended it on Twitter in 2020.
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“Nobody’s perfect, but I’ve never met anyone who goes through more personal pain to fight for an inspiring future for humanity — and has done so tirelessly for decades,” she wrote. “Everyone is entitled to their opinion, but mine is that there is no man I respect and admire more.”
Grimes aka Claire Boucher
Grimes, 34, and Musk were first romantically linked in May 2018 when they appeared together at the Met Gala.
Claire Boucher aka Grimes with her ex-boyfriend Elon Musk. (Taylor Hill/Getty Images)
They welcomed a son in May 2020 named X Æ A-Xii, whom they call X, and a daughter, Exa Dark Sideræl, who is called Y, via surrogate in December 2021.
A photo mash-up of Elon Musk bonding with X Æ A-Xii, his son with ex Claire Boucher aka Grimes. (Instagram)
Grimes tweeted last March that the couple had ended their relationship on and off.
“He is my best friend and the love of my life,” she wrote.
Amber Heard
Although Musk has no confirmed children with Amber Heard, they began dating in mid-2016 before calling it quits for good in February 2018.
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Musk gave the Aquaman actress a Tesla and made nearly $1 million in donations to various charities in her name.
Meanwhile, Heard told her agent she didn’t love him and was just “filling in space,” according to testimony in Johnny Depp’s defamation trial against her.
A photo collage of Amber Heard and Elon Musk, who were romantically linked from 2016-18 (AP)
Heard, 36, gave birth to a daughter, Una Paige Heard, via a surrogate in April 2021, but has never revealed the identity of the father or sperm donor.
On Instagram, she wrote that she is both mother and father of the child.
Tallulah Riley
36-year-old British actress Tallulah Riley and Musk were married twice but never had children.
The two first married in 2010 after he left his first wife Justine Wilson for the much younger brunette, who starred in the film Pride and Prejudice.
Elon Musk and his ex-wife Tallulah Riley with his twins Griffin and Vivian at the Nasdaq opening ceremony in New York on June 29, 2010. (Daniel Acker via Getty)
Two years later, the two divorced, only to remarry in July 2013. The couple separated in 2016 after a whirlwind 8-year romance.
Justin Wilson
The SpaceX founder and the Canadian writer, whom he met while attending Queen’s University, married in 2000.
After their first child, Nevada, died in 2002, the couple decided to use IVF to grow their family, Wilson wrote in a 2010 Marie Claire essay titled “I Was a Starter Wife”: Inside America’s Messiest Divorce.”
Justine Wilson, ex-wife of Elon Musk, pictured with Global Green CEO Matt Petersen in June 2012. (Jason Merritt via Getty)
They had twins: Vivian, who was named Xavier at birth, and Griffin in 2004. Both are 18. The couple welcomed triplets Kai, Saxon and Damian in 2006, and the trio is now 15, according to Hollywood Life.
In 2008, Musk filed for divorce. Six weeks later, he texted Wilson, 49, that he was engaged to Riley, then 20, and the two were living together in Los Angeles, according to Marie Claire.
Photo of Elon Musk and his first wife Justine Wilson, the mother of his six children. (Instagram)
Although Musk often posts pictures of his children online, little is known about them.
Vivian Jenna Wilson, who is transgender, legally changed her name from Xavier Musk in June 2022, one day after she turned 18.
Elon Musk holds his twins, Vivian and Griffin, with his first wife Justine Wilson in 2004 (Instagram)
She cited gender identity and dislike of her father as reasons.
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“I no longer live with or wish to be associated with my biological father in any way, shape or form,” she wrote in the petition, taking her mother’s last name.
Emmett Jones and The Associated Press contributed to this report.
Rebecca Rosenberg is a veteran journalist and author of books focusing on crime and criminal justice. Send tips to rebecca.rosenberg@fox.com and @ReRosenberg.
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