Kuyavia, or Kujawy, is also a region in Poland.
It is quite a ways away from Kiev, so I would guess that it is just a similar name. There is also a Minsk in Poland near Warsaw (Mińsk Mazowiecki), while the more known one is the capital of Belarus. A part of Warsaw, which used to be a separate town way back when, is called Praga, with the Czech capital often referred to as "Praga Czeska" by Varsovians.
There must be many more instances of similar sounding places around Slavic Europe. It goes to show how close we all are, whether we like it or not!