Where does “Praag” come from?

Praag (Dutch) comes from German Prag, 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 “Praag”, step by step

StepLanguageWordMeaning
1GermanPrag—
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 →