Elon Musk and Grimes' child born in 2021 is named Exa Dark Sideræl Musk, also known as "Y." Grimes announced the name change in March 2022, stating that they refer to her as "Y." The unique name has significant meanings, with "Exa" referring to a supercomputing term and "Dark" representing "the unknown."
In response to Page Six's congratulations in 2022, Elon Musk said, "Bravo to big families." He expressed his desire to have "as many [kids] as I am able to spend time with and be a good father3." Musk reiterated this sentiment in a tweet, stating, "A collapsing birth rate is the biggest danger civilization faces, by far."
In his 2022 tweet, Elon Musk expressed concern about the "collapsing birth rate," stating that it is the biggest danger civilization faces by far.