Exa Dark Sideræl Musk and Techno Mechanicus Musk (Children)
In her 2022 Vanity Fair In an interview, Grimes said that she and Elon privately gave birth to a girl through surrogacy.
“Exa is a reference to the supercomputing term exaFLOPS (the ability to perform 1 quintillion floating point operations per second),” she said. “Darkness, meanwhile, is the unknown. People are afraid of it, but in reality it is the absence of photons. Dark matter is a beautiful mystery of our Universe.”
Sideel (pronounced sigh-deer-ee-el) is, according to Mom, “the true time of the Universe, sidereal time, deep space time, not our relative Earth time,” and is a reference to her favorite time. Lord of the Rings character, Galadriel, who “decides to renounce the ring.”
Walter Isaacson revealed in his biography Elon Musk that Eksa was born in December 2021 from a surrogate mother.
The book also says that on the eve of Father's Day 2022, the on-again, off-again couple had a baby named Techno Mechanicusby nickname Yesalso through a surrogate mother. The biography includes a photo dated June 2022 of Elon feeding the boy.
Although Grimes would prefer to keep other important details secret. “I tried to plead with the public and the father of my children to keep them offline and I tried to go to court,” she shared on social media in 2025. “I have serious concerns about how my children's lives are being made public, and I think about how to solve this problem every day. It's crazy to me that there's no way to deal with this.”
