X, a-E, Aeropostol?

Musk met Grimes via Twitter in 2018. The baby is named X, A-E, one letter, and then A-12. According to a tweet from Grimes, the baby is named this because... Okay, X is... X is the unknown variable. So true. Always saying that. She says is my elven spelling of AI, meaning artificial intelligence, or possibly love. Plus A equals Archangel, which is my favorite song. Is that one of them? I was thinking of A-on flux, but maybe I wasthinking of A- on flux too.