Exa Darksideral Musk & Techno Mechanicus Musk (Kids)
In a 2022 interview with Vanity Fair, Grimes revealed that she and Elon had unofficially given birth to a baby girl through a surrogate.
“Exa is a reference to the supercomputing term exaFLOPS, the ability to perform 1 quintillion floating point operations per second,” she said. “Darkness, on the other hand, is the unknown. People are afraid of it, but in reality, it’s the absence of photons. Dark matter is a beautiful mystery of our universe.”
According to Mama, “Side-el” is pronounced “sigh-deer-el” and is “not Earth-relative time, but true cosmic time, star time, deep space time” and is a nod to her favorite Lord of the Rings character Galadriel, who “chose to renounce the Ring.”
Walter Isaacson revealed in his biography Elon Musk that Exa was born in December 2021 by a surrogate mother.
The book also states that around Father’s Day in 2022, the couple On Again and Off Again welcomed a child named Techno Mechanicus (nicknamed Tau), also through a surrogate mother. The biography includes a photo (dated June 2022) of Elon breastfeeding a baby boy.
However, Grimes prefers to keep other important details private. In 2025, she shared on social media, “I begged the public and the father of my children to stay offline and even resorted to legal action.” “The situation where children’s lives are made public is a serious concern to me and I think about how to resolve this every day. It’s insane to me that there is no way to address this.”
