Origin and meaning of Polish city names?

Cześć all!
I'm wondering about the origin of the names Warszawa, Kraków, Lublin, Rzeszow, Katowice, Gdynia, Elk, Suwałki and Toruń. Can anyone please help?

Warszawa is a name createdon the name of a person, in this case the person was Wars or Warsz, hence the originalname of the location --> Warsz-owa (possession of Wars, village of Wars).

Kraków is a very old name, first recorded in 965, but it certainly existed long before that year.

Toruń is a re-polonized German name (Thorn) which in turn was a germanized Polish name (Tarnina or Tarnow)

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.