Where does “Rousseff” come from?

Rousseff (Portuguese) comes from Bulgarian Русев, from Bulgarian Ру́се, from Ancient Greek ῥοῦς, from Ancient Greek ῥόος, from Proto-Hellenic hrówos, from Proto-Indo-European srówos, from Proto-Indo-European srew-, from Proto-Indo-European ser- — to flow; to guard; to bind, to tie together.

Ancestry of “Rousseff”, step by step

StepLanguageWordMeaning
1BulgarianРусев
2BulgarianРу́се
3Ancient Greekῥοῦςsumac; its fruit, used in medicine; ryegrass
4Ancient Greekῥόοςstream, flow, current
5Proto-Hellenichrówos
6Proto-Indo-Europeansrówos
7Proto-Indo-Europeansrew-to flow, stream
8Proto-Indo-Europeanser-to flow; to guard; to bind, to tie together
Every word from Proto-Indo-European ser-Every word from Proto-Indo-European srew-Every word from Proto-Indo-European srówos