Where does “Roch” come from?

Roch (Polish) comes from Polish -ch, from Old Polish -ch, from Proto-Slavic -xъ.

Ancestry of “Roch”, step by step

StepLanguageWordMeaning
1Polish-chAttached to truncated stems of common nouns to...
2Old Polish-chAttached to truncated stems of masculine given...
3Proto-Slavic-xъ—
Every word from Proto-Slavic -xъ →Every word from Polish -ch →Every word from Old Polish -ch →
Roch — Etymology, Origin & Word History | Etymology Explorer