Elon Musk's 12 children: What we know about them

​X Æ A-Xii (pronounced as X Ash A Twelve), Musk and Grimes' first son, was born in May 2020. In December 2021, they welcomed their first daughter Exa Dark Sideræl (pronounced as Sigh-deer-ee-el) via surrogate. Their son, originally named X Æ A-12, had to have his name legally changed to follow California laws on birth certificates, though his parents simply refer to him as “X.”