The couple had their first child in early May, confirming the intention to call him, X Æ A-12. https://twitter.com/Grimezsz/status/1257836061520101377 However, the singer has revealed that the baby’s name will now be, X Æ A-Xii, because in California you cannot put numbers inside a name.
— Elon Musk (@elonmusk) May 6, 2020 Grimes commented, “Roman numerals look better anyway.” According to California law, names on birth certificates can only use the 26 letters of the alphabet, although apostrophes and hyphens can be added.
