Can the president unilaterally change the names of anything he wants?

Maybe for things inside his own country. Though the affected local governments may object.

But for bodies of water that contain international waters, and that border other countries? Fuck no he doesn’t.

There is no legal mechanism to compel private companies to use the new name.

There is also no legal mechanism to require any other country on the planet to pay attention to Trump’s stupid and pointless attempt at renaming it.

Both Israelis and Palestinians claim to have a “God given right” to that very same piece of sand.

I suspect that’s a large part of why this conflict has been ongoing for longer than most of the combatants have been alive.

Problem is, bullshit like this also kills people outside the US borders - people who didn’t get a vote in this but will be negatively impacted.