On Monday night (4 May), Elon Musk confirmed that Grimes had given birth to their first child, and revealed that the baby's name is X Æ A-12.

While some followers were convinced the name was just a hoax, Grimes reiterated the name is real last night (5 May) on Twitter by explaining the individual characters that make up the name.

Grimes, aka Claire Boucher, reveals the "X" stands for "the unknown variable", "Æ" represents her "elven spelling of Ai (love &/or Artificial intelligence)", "A-12" is a "precursor to SR-17 (our favorite aircraft). No weapons, no defenses, just speed. Great in battle, but non-violent", and the "A" also represents Grimes' favourite song "Archangel". Although she hasn't confirmed who is behind her favourite song, many fans think it's Burial's track of that name.

Grimes' Miss Anthropocene album is out now.