X is also the first letter of Musk's son's name.
https://metro.co.uk/2023/07/24/elon-musk-twitter-x-new-name-obsession-19179166/?utm_source=dlvr.it&utm_medium=blogger
https://metro.co.uk/2023/07/24/elon-musk-twitter-x-new-name-obsession-19179166/?utm_source=dlvr.it&utm_medium=blogger