
Photo: Dimitrios Kambouris/Getty Images for The Met Museum/Vogue
The known total of Elon Musk's kids rose to nine when Insider reported he had twins in November with Shivon Zilis, a director at Neuralink, the brain-interface company where Musk is a founder and co-CEO.
Driving the news: Neither has spoken publicly about the twins. Insider obtained Austin court documents approving a name change for the babies.
- "Zilis lived in San Francisco before buying a home in a gated community in Austin in August, about three months before the twins were born," Insider reported.
Why it matters: The "inherent power dynamic between the two raises questions about workplace ethics, including whether any company policies were violated," the N.Y. Times writes.

Doing the math: The twins were born weeks before Musk's second child with the musician Grimes, born in December.
- She, too, "relocated full time to Austin," Vanity Fair reported in March.
- Grimes tweeted about the Vanity Fair piece: "Me and E have broken up *again* since the writing of this article haha, but he's my best friend and the love of my life."
Musk has five kids — twins and a set of triplets — with his first wife, writer Justine Musk, who has called herself his "starter wife."