Rusu de Sus (Romanian) comes from Romanian rus, from Russian русь, from Old East Slavic Русь, from Finnish ruotsi, from Proto-Finnic *roocci, from Old Swedish roþs-, from Old Norse róðr, from Proto-Germanic rōþrą — to row; to separate; loose, sparse, rare.
Ancestry of “Rusu de Sus”, step by step
Rusu de Sus traces back through 3 separate lines of ancestry.