Elon Musk and Grimes welcomed their first child on Monday.
The SpaceX CEO shared with fans on Twitter that he became a father to a baby boy – his sixth child and the Canadian singer’s first. He later shared that they named their bundle of joy X Æ A-12.
Grimes later shared the meaning behind the unconventional 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."
The "A" in the name also represents Archangel, Grimes’ favourite song, while "12" also stands for the Chinese zodiac sign of the rat – and 2020 is the Year of the Metal Rat, which explains her added emojis.
•X, the unknown variable ??— ? ? Gℜi??es ?? ?????? ??? (@Grimezsz) May 6, 2020
•Æ, my elven spelling of Ai (love &/or Artificial intelligence)
•A-12 = precursor to SR-17 (our favorite aircraft). No weapons, no defenses, just speed. Great in battle, but non-violent ??
(A=Archangel, my favorite song)
(???? metal rat)
E! News brilliantly broke down – with the help from a few fans on Twitter – how to pronounce the newborn’s name, which doesn’t seem all that bizarre now. All together now: Ex Ash Archangel.