Warszawa, Kraków, Lublin, Rzeszow, Katowice, Gdynia, Elk, Suwałki and Toruń.
Kraków comes from Krak, a legendary ruler who started the settlement.
Gdynia comes from the root word gъd which means wet, swampy.
Katowice probably comes from Kat, the first settler or owner of a smithy.
Lublin comes from the male first name Lubla which in turn originates from Lubomir.
Rzeszów comes from the male first name Rech, Rzesz or Rzetysław.
Suwałki is a Lithuanian word which means a wet, swampy place.
Ełk probably comes from the name of a local river - Łyk.