Where does “Rebreanu” come from?

Rebreanu (Romanian) comes from Romanian Rebra, from Old Church Slavonic ребро, from Proto-Slavic rebrò, from Proto-Balto-Slavic *rébran, from Proto-Indo-European h₁rebʰ- — to cover, to roof; rib.

Ancestry of “Rebreanu”, step by step

StepLanguageWordMeaning
1RomanianRebra—
2Old Church Slavonicреброrib
3Proto-Slavicrebròrib
4Proto-Balto-Slavic*rébranrib
5Proto-Indo-Europeanh₁rebʰ-to cover, to roof; rib
Every word from Proto-Indo-European h₁rebʰ- →Every word from Proto-Balto-Slavic *rébran →Every word from Proto-Slavic rebrò →