The Complete List: How Many 'Baby Mamas' Does Elon Musk Have? (Spoiler: It's More Than You Think)

The question of how many children and 'baby mamas' Elon Musk has is one of the most frequently searched queries on the internet, and the answer is constantly evolving. As of December 10, 2025, the tech billionaire and CEO of Tesla, SpaceX, and X (formerly Twitter) is the father of a staggering 14 children, who he shares with four different women. This total includes a tragic loss and a number of recent, highly private births that have only been confirmed in late 2024 and early 2025, cementing his status as one of the world's most prolific fathers.

The latest updates, confirmed in the fall of 2024 and early 2025, reveal a growing family tree that includes a new mother and a new baby named Romulus. The driving force behind this large family is Musk's publicly stated belief that a declining birth rate is one of the greatest threats to human civilization, leading him to "do his part" to reverse the trend. Here is the definitive, up-to-the-minute breakdown of Elon Musk's family, profiling the four mothers and all 14 of his children.

Elon Musk's Family Tree: The Four Mothers and 14 Children

Elon Musk has welcomed 14 children with four partners over the past two decades. The relationships span his first marriage, a high-profile romance with an eccentric musician, a professional partnership with a top executive, and a newly revealed connection with a conservative influencer. The sheer number of children, and the unusual names of many of them, has captivated the public and media worldwide.

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1. Justine Wilson (First Wife and Mother of 5)

Justine Wilson is a Canadian author and Musk’s first wife. They met while attending Queen’s University in Ontario and were married from 2000 to 2008. She is the mother of his first six children, though one tragically passed away.

• Nevada Alexander Musk (2002): The couple's first child, Nevada, tragically died of Sudden Infant Death Syndrome (SIDS) at just 10 weeks old.
• Griffin Musk and Vivian Wilson (2004): Twin sons born via IVF. Vivian, formerly Xavier, legally changed her name and gender in 2022, choosing to take her mother's maiden name, Wilson.
• Kai Musk, Saxon Musk, and Damian Musk (2006): Triplets born via IVF.

Wilson has been open about her co-parenting relationship with Musk and the challenges of raising their five surviving children, often sharing her experiences as a first wife to a prominent billionaire.

2. Claire "Grimes" Boucher (Musician and Mother of 3)

Grimes is a Canadian musician, artist, and producer known for her experimental style and unique aesthetic. Her relationship with Musk was highly publicized from 2018 to 2021, and they are known for giving their children some of the most unusual names in celebrity history.

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• X Æ A-Xii (X) (Born May 2020): Their first son, initially named X Æ A-12, had his name legally changed to comply with California law, which prohibits numbers in a name. His nickname is "X."
• Exa Dark Sideræl Musk (Y) (Born December 2021): Their daughter was born via surrogate, and her existence was revealed in a 2022 Vanity Fair interview. Her nickname is "Y."
• Techno Mechanicus (Tau) (Born 2023): The existence of their third child, a son nicknamed "Tau," was confirmed in a 2023 biography of Musk, adding a surprise third child to their shared family.

The names of their children—X, Y, and Tau—are often seen as reflections of their parents' shared interest in technology, science fiction, and futuristic concepts. Grimes and Musk continue to co-parent their three children despite the on-again, off-again nature of their romantic relationship.

The Two Newest Mothers: Shivon Zilis and Ashley St. Clair

The most recent additions to Musk's family have come from two different women, both of whom have professional or public profiles. These births have dramatically increased the total number of children and mothers in a short period, bringing the total to 14 children and four mothers.

3. Shivon Zilis (Neuralink Executive and Mother of 4)

Shivon Zilis is a high-ranking executive at Neuralink, one of Musk’s technology companies, and a prominent figure in the artificial intelligence (AI) community. The news of her children with Musk first broke in 2022, but the family has expanded significantly since then.

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• Strider and Azure (Born 2021): Boy-girl twins born via IVF. They were born just weeks before the birth of Musk's second child with Grimes (Exa Dark Sideræl).
• Arcadia (Born February 2024): Their third child, a daughter, whose birth was confirmed in early 2024.
• Seldon Lycurgus (Born 2024): Their fourth child, a son, was also born in 2024, bringing their total shared children to four.

The relationship between Zilis and Musk has been described as a professional and co-parenting one, with Zilis sharing Musk’s concerns about underpopulation. The birth of four children in quick succession has added further complexity to the billionaire’s already large family structure.

4. Ashley St. Clair (Conservative Influencer and Mother of 1)

In the most recent and perhaps most surprising revelation, conservative political commentator and influencer Ashley St. Clair was confirmed as the mother of Musk's 14th child. This news, revealed in late 2024, was a significant public surprise.

• Romulus (Born September 2024): St. Clair gave birth to a son named Romulus in September 2024. The name, like that of Romulus’s twin brother Remus in Roman mythology, adds another layer of historical and literary reference to Musk’s unique baby naming conventions.

This new addition brings the total number of mothers to four and the total number of children to 14, making the Musk family tree one of the most discussed topics in the world of business and celebrity.

Why the Secrecy and the Focus on Family Expansion?

The frequent, and often private, expansion of Elon Musk's family is not merely a matter of personal choice; it is tied directly to his philosophical and existential beliefs. Musk has repeatedly and publicly stated that he believes a declining global birth rate is a catastrophic risk to humanity, often referring to it as the "biggest danger civilization faces by far."

His actions are a clear reflection of this conviction. By having 14 children with four different women—all of whom are accomplished, intelligent, and successful in their own right—Musk is actively attempting to set an example. The total number of children, and the number of mothers, has become a subject of intense global curiosity, not just for the 'baby mama' aspect, but because it is a direct, tangible expression of his world view.

The use of advanced reproductive technologies, such as IVF and surrogacy, in several of these births further underscores the deliberate and intentional nature of his family planning. Entities like Neuralink, SpaceX, and Tesla, while distinct in their missions, are all part of Musk's vision for the future, a future he clearly intends to fill with his own descendants.

The Future of the Musk Family Tree

Given the rapid pace of recent additions—with at least three children born in 2024 alone, including the newest baby, Romulus—it is highly likely that the number of children and mothers could continue to increase. Elon Musk’s family has grown from a conventional five children with his first wife to a complex, multi-family structure of 14 children with four mothers in just over two decades.

The narrative surrounding the 'baby mamas' is less about scandal and more about a man who is actively trying to shape the future through population growth, a concept he sees as vital to the survival of humanity. For now, the answer to "How many baby mamas does Elon Musk have?" is a firm four, with a total of 14 children, but the world remains on watch for the next chapter in the ever-expanding Musk dynasty.