The three companies did not respond to requests for comment.

Meta encountered legal issues related to intellectual property when it decided to rebrand from Facebook. The company faced trademark lawsuits from Metacapital, an investment firm, and MetaX, a virtual-reality company, both of which were filed last year. Additionally, Meta had to resolve another lawsuit concerning its new infinity-symbol logo.

And if Musk succeeds in changing the name, others still could claim ‘X’ for themselves.

“Given the difficulty in protecting a single letter, especially one as popular commercially as ‘X’, Twitter’s protection is likely to be confined to very similar graphics to their X logo,” said Douglas Masters, a trademark attorney at law firm Loeb & Loeb.

“The logo does not have much distinctive about it, so the protection will be very narrow.”

Earlier, there was a report stating that Meta possessed a trademark labeled as “X,” and a lawyer named Ed Timberlake tweeted that Microsoft also had a similar trademark.