Grimes is sharing the meaning behind her son’s unique name.
The 32-year-old singer, born Claire Boucher, explained on Twitter why she and her boyfriend, Tesla and SpaceX CEO Elon Musk, named their baby boy X Æ A-12.
“X, the unknown variable,” she wrote. “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.”