Grimes Quietly Welcomed a Third Child With Elon Musk: What to Know

Elon Musk and Grimes's Kids: X Æ A-Xii or X

Grimes and Elon welcomed their first child, X, in May 2020. "Mom & baby all good," Elon tweeted at the time. Later that week, Grimes explain the significance of her child's name on Twitter. "X, the unknown variable," she wrote. "Æ, my elven spelling of Ai (love &/or Artificial intelligence). A-12 = precursor to SR-17 (our favourite aircraft). No weapons, no defences, just speed. Great in battle, but non-violent + (A = Archangel, my favourite song) (metal rat). I think it sounds like the name of the main character in the story. I hope he vibes with that. OK, going back into the pain/ beauty reverie for [some] time, just came on to add my thoughts. Peace to all."

Grimes and Elon began dating in 2018 and made their debut as a couple at the Met Gala that year. In September 2021, Elon told Page Six that the pair were "semi-separated" but remained friends and were still living together. Then, in a December 2021 interview with Vanity Fair, Grimes said that she would "probably refer to [Elon] as my boyfriend, but we're very fluid. We live in separate houses. We're best friends. We see each other all the time."

Yet they ran into trouble with that name due to California law, which specifies that names can only contain letters, not characters. Grimes later announced in an Instagram comment that they'd changed their son's name to X Æ A-Xii, replacing 12 with numerals, per People, but a birth certificate obtained by TMZ revealed that the baby's official name is simply X.

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Elon Musk and Grimes's Kids: Y or ?

Image Source: Getty / ANGELA WEISS

Grimes and Elon welcomed their second child via surrogacy in 2021, Grimes revealed in a Vanity Fair interview. Later on, she shared that she hadn't planned on revealing the existence of her second child in the story. "Def held back a lot, contrary 2 headline," she tweeted a few days after the piece was published, per CNN. "& didn't mean for them 2 find out about my daughter so please respect her privacy as I'd love her to be able to live as private of a life as possible."

The baby was originally named Exa Dark Sideræl Musk, though now her nickname — Y — appears to be her new official moniker.

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Elon Musk and Grimes's Kids: Techno Mechanicus

Image Source: Getty / Gilbert Carrasquillo

According to Isaacson's Musk biography, the pair's third child, Techno Mechanicus, goes by Tau, per The New York Times. Many online believe the baby's name is a reference to Warhammer 40,000, a miniature war game. Mechanicus is a faction in the game.

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