Grimes and Elon Musk’s child X AE A-XII will celebrate his first birthday in May, but is already making music, described as “super fire” by his mother.Originally called X Æ A-12, the baby was then officially named X AE A-XII Musk, according to a birth certificate.The official name came after Grimes revealed that she and Musk were asked to change their baby son’s name to comply with California law.