The name of Elon Musk's son with Canadian musician Claire Elise Boucher, known professionally as "Grimes." Born May 4, 2020, X AE A-Xii is pronounced "X Ash A-12." The AE is Elven spelling for Elves in The Lord of the Rings. A-Xii stands for Archangel 12, the 1960s reconnaissance aircraft built by Lockheed for the CIA, which was the "coolest plane ever" according to Musk.
Uncommon to Say the Least
Having named his financial services company x.com, his rocket ship company SpaceX and renamed Twitter to X, Musk is obviously quite fond of the letter X. See
X.com and
SpaceX.