@liilliil the "original name" of Istanbul was Lygos, and yet we recognize the right of the people who live there to call it whatever they very well please – and insist we also call it such.
So when Ukrainians tell me they prefer Kyiv to be called Kyiv, I call it Kyiv. It's just common decency.
incidentally, denying this kind of basic agency to Ukrainians is a mainstay of Kremlin's propaganda around this war.