Where does “prażanka” come from?

prażanka (Polish) comes from Polish Praga, from Czech Praha, from Czech práh, from Old Czech práh, from Proto-Slavic porgъ, from Proto-Balto-Slavic parˀgas, from Proto-Indo-European porg-o-.

Ancestry of “prażanka”, step by step

StepLanguageWordMeaning
1PolishPraga—
2CzechPraha—
3Czechpráhdoorstep
4Old Czechpráhthreshold
5Proto-Slavicporgъthreshold, doorstep
6Proto-Balto-Slavicparˀgas—
7Proto-Indo-Europeanporg-o-—
Every word from Proto-Indo-European porg-o- →Every word from Proto-Balto-Slavic parˀgas →Every word from Proto-Slavic porgъ →