Grimes says she's changed her and Elon Musk's daughter's name from Exa Dark Sideræl to a symbol

• Grimes revealed that she wanted to change her daughter with Elon Musk's name to a symbol.

• She said she wanted the child to be called "?" but the government wouldn't recognize it.

• The child, previously named, Exa Dark Sideræl, now goes by "Y" or "why?," Grimes said.

Grimes has changed the name of her daughter with Elon Musk to a symbol, although she says the government won't officially acknowledge it.

The singer said 15-month-old Exa Dark Sideræl's name has been shortened.

"She's Y now, or "Why?" or just "?" (But the government won't recognize that).  curiosity, the eternal question,  .. and such," Grimes wrote on Twitter on Thursday.

Grimes made the revelation after sharing a rare photograph of the child in a red onesie with green hair alongside an image of herself in a matching get-up.