Elon Musk and Grimes' first son's name, X Æ A-12, is pronounced "X-Ash-A-Twelve," with the "Æ" pronounced as "Ash" and "A-12" representing a tribute to the Lockheed A-12 aircraft. To comply with California regulations, the name was later legally adjusted to X Æ A-Xii. For a detailed breakdown of the name, you can read the article on thetimesofindia.indiatimes.com.