Where does “Prague” come from?

Prague comes from Czech Praha, a word of unknown origin whose ultimate etymology remains undetermined.

Ancestry of “Prague”, step by step

Step	Language	Word	Meaning
1	German	Prag	—
2	Czech	Praha	—
3	Czech	práh	—
4	Old Czech	práh	—
5	Proto-Slavic	porgъ	threshold, doorstep
6	Proto-Balto-Slavic	parˀgas	—
7	Proto-Indo-European	porg-o-	—

Prague — Etymology, Origin & Word History | Etymology Explorer