Where does “Rogojanu” come from?

Rogojanu (Romanian) comes from Romanian Rogoaza, from Romanian rogoz, from Proto-Slavic rogozъ — reed, rush.

Ancestry of “Rogojanu”, step by step

StepLanguageWordMeaning
1RomanianRogoaza
2Romanianrogozsedge (Carex), greater pond sedge (Carex riparia) or true fox-sedge (Carex vulpina)
3Proto-Slavicrogozъreed, rush
Every word from Proto-Slavic rogozъEvery word from Romanian rogozEvery word from Romanian Rogoaza