Elon Musk and Shivon Zilis welcome their fourth child together, a son named Seldon Lycurgus, adding to their growing family.

Elon Musk and Shivon Zilis have welcomed their fourth child together, a son named Seldon Lycurgus. Zilis made the announcement in a heartfelt post on February 28, 2025, sharing the joy of their growing family with her followers.

“Built like a juggernaut, with a solid heart of gold,” Zilis wrote on social media, introducing Seldon to the world.

Musk, 53, who is known for his public presence but more reserved personal life, simply responded to the post with a heart emoji, a symbol of his affection for their newest addition.

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While Zilis did not disclose the exact birth date of Seldon, the announcement marks a significant moment for the couple, who have managed to keep much of their family life private.

This new addition to the Musk family comes just one year after the couple celebrated the first birthday of their daughter Arcadia.

Arcadia’s birthday coincided with the announcement of Seldon’s birth, prompting Zilis to reflect on her joy in a separate post, calling her daughter “wonderful” and expressing boundless love for her.

Musk and Zilis already share twins Strider and Azure, who turned 3 in 2024. The couple’s growing family has raised many questions over the years about the dynamics of Musk’s personal life, but those close to him say he has a deep affection for Zilis and their children.

A source close to Musk confirmed, “He really loves Shivon,” highlighting the bond they share beyond their busy professional lives.

Musk’s relationship with Zilis has remained a relatively private matter, with the couple largely steering clear of public scrutiny. However, their growing family, which now includes four children together, continues to capture attention.

This is Musk’s 14th child, a remarkable feat considering his large and blended family.

Zilis and Musk first revealed the birth of their twins Strider and Azure in November 2021, a few weeks before Musk and his ex-partner, musician Grimes, welcomed their daughter Exa Dark Sideræl through a surrogate.

The birth of Arcadia in 2024 was another milestone for Musk and Zilis, as they continued to quietly expand their family. Musk’s other children from previous relationships also make up a significant part of his life.

With his ex-wife Justine Wilson, Musk has had six children, including twins Vivian and Griffin, 20, and triplets Kai, Saxon, and Damian, 19.

Musk also shares son X Æ A-12, daughter Exa Dark Sideræl, and son Techno Mechanicus (Tau), 2, with Grimes.

Despite the complexities of his family, Musk has maintained a focus on his groundbreaking work with companies like Tesla and SpaceX.

Beyond their growing family, Musk’s relationship with Zilis has been a topic of interest among many, especially since the birth of their children.

In fact, a few months prior, in September 2023, Grimes and Zilis had a public exchange on social media, sharing their mutual respect for each other and discussing their experiences raising children with Musk.

Zilis expressed her gratitude for their conversation, calling it “overdue” and reflecting on how their understanding of their shared parenting journey had strengthened.

Grimes echoed the sentiment, celebrating the positive connection they now share. This exchange highlighted the collaborative and respectful approach both women have taken in their roles as mothers to Musk’s children.

The latest chapter in Musk’s family life comes amid the revelation of his 13th child, born to Ashley St. Clair, a conservative influencer. St. Clair revealed in a February 14, 2025, post that Musk is the father of her son, R.S.C., who is now five months old.

She also shared that she had kept the child’s identity private to protect their safety and privacy, only releasing the information due to growing media attention.

A representative for St. Clair has since stated that Musk has been “privately working” with her to establish a custody arrangement for their child.

On February 28, 2025, a judge ordered Musk to appear at a May 29 hearing concerning the custody of R.S.C., adding another legal complication to Musk’s personal life.

Despite the attention surrounding his family and personal matters, Musk has maintained a relatively low profile regarding his relationships and children.

Representatives for Musk have not publicly commented on his latest child, his growing family, or the ongoing custody dispute with St. Clair.

Musk’s role as a father to so many children from different relationships has certainly made for a fascinating family dynamic, one that has sparked interest and curiosity from the public and media alike.

While Musk remains focused on his entrepreneurial endeavors, his family life continues to capture attention as the Musk-Zilis family grows with the arrival of Seldon Lycurgus.

With more children than many families have in total, Musk’s personal life is now the subject of intense public scrutiny, but those who know him best note his devotion to his children and his desire to create a loving, supportive environment for them.

As Musk’s family continues to expand, the complexities of his personal life may evolve, but it is clear that his children, from his various relationships, will always remain a central part of his world.

The arrival of Seldon Lycurgus marks another important moment for Musk and Zilis, signaling the ongoing evolution of Musk’s family, even as he faces other challenges in his personal and professional life.