In a new interview, Grimes revealed the nickname "X → A-Xii" for her baby with Elon Musk. Originally named X → A-12, the parents were forced to change the name because California naming laws prohibit the inclusion of numbers. Roman numerals. Roman numerals are better," Grimes told fans on Instagram.

Speaking to Bloomberg (opens in new tab), Grimes revealed that she calls her newborn by a different name at home: she uses the nickname "Little X." Cute.

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