Meaning & History
The second middle name of Exa Dark Sideræl Musk (2021-), daughter of Elon Musk and Claire "Grimes" Boucher. According to Grimes, it is a spelling variation of the English word sidereal "of or pertaining to the stars", in order to be more 'Elven'. The word itself is ultimately derived from Latin sidus meaning "star, constellation".