Ironically, the name "Kiev" would be no less offensive becuase this spelling of the name implies that this is a Russian city, not a Ukrainian one. The official and correct spelling is "Kyiv", see http://kyiv.of-cour.se/ for explanations why.
Pedantically it would be much less, even none at all, offensive, since nobody will care whether a programming language's name is not written in Cyrillic, since the latin alphabet is the default for such names anyway.