Where does “Răhovean” come from?

Răhovean (Romanian) comes from Romanian Rahova, from Bulgarian Оряхово, from Old East Slavic орѣхъ, from Proto-Slavic orěxъ, from Proto-Indo-European areyis-.

Ancestry of “Răhovean”, step by step

StepLanguageWordMeaning
1RomanianRahova—
2BulgarianОряхово—
3Old East Slavicорѣхъ—
4Proto-Slavicorěxъnut; walnut
5Proto-Indo-Europeanareyis-—
Every word from Proto-Indo-European areyis- →Every word from Proto-Slavic orěxъ →Every word from Old East Slavic орѣхъ →