Where does “Kosch” come from?

Kosch (German) comes from Estonian Kose, from Veps kosk, from Persian کوشک, from Middle Persian kwšk', from Proto-Indo-European gēw- — to bend, arch.

Ancestry of “Kosch”, step by step

StepLanguageWordMeaning
1EstonianKose—
2Vepskoskrapids
3Persianکوشکpavilion; palace; mansion
4Middle Persiankwšk'pavillion; palace
5Proto-Indo-Europeangēw-to bend, arch
Every word from Proto-Indo-European gēw- →Every word from Middle Persian kwšk' →Every word from Persian کوشک →