Simple and easy:
Like you, perhaps, I grew up with “Kiev” — as in “chicken Kiev” and “The Great Gate of Kiev.” Here in the city itself, they want “Kyiv.” Why? Fussiness? An urge to be newfangled? No. “Kiev” derives from the Russian, and “Kyiv” from the Ukrainian. “Kyiv” is an expression, or an acknowledgement, of Ukrainian independence and nationhood.
Ukraine and Us by Jay Nordlinger – December 19, 2019 (https://www.nationalreview.com/magazine/2019/12/31/ukraine-and-us/#slide-1) – National Review PLUS Magazine December 31, 2019, Issue