There are many airports in this game that changed it's name over the years and whatever they're called at any given game-time is not necessary absolutely faithful to the real history. It would obviously be great to have a feature of airport name updates but I'm not quite sure if it's feasible without a whole airport closing down and opening anew, which can create a lot of issues with things like demand and is generally much ado about nothing.
In this particular case a bigger omission is the very existence of that airport pre-1974 when it replaced a smaller, closer to the city centre one. But again, much hassle for little gain. As far as naming goes though, a neat solution for airports in Poland would be to replace all the official person based names with locations, no one calls GDA "Lech Wales Airport" - it's known as "Gdansk-Rebiechowo" or just "Rebiechowo".