Exa Dark Siderael, nicknamed ‘Y’ is Tesla CEO Elon Musk and singer-songwriter Grimes' baby girl, they welcomed in December 2021 via surrogacy, the latter revealed in an interview with Vanity Fair for their April issue. Grimes called the word "a more elven" spelling of sidereal, which she defined as "the true time of the universe, star time, deep space time, …
