Where does “Kaluga” come from?

Kaluga (Turkish) comes from Russian Калу́га, from Russian лужа, from Proto-Slavic luža, from Proto-Slavic lugja.

Ancestry of “Kaluga”, step by step

StepLanguageWordMeaning
1RussianКалу́гаkaluga, great Siberian sturgeon type of sturgeon
2Russianлужаpuddle, pool
3Proto-Slaviclužapuddle, pool
4Proto-Slaviclugja—
Every word from Proto-Slavic lugja →Every word from Proto-Slavic luža →Every word from Russian лужа →