Rusi (Albanian) comes from French Russie, from Medieval Latin Russia, from Medieval Latin Russi, from Old East Slavic Русь, from Finnish ruotsi, from Proto-Finnic *roocci, from Old Swedish roþs-, from Old Norse róðr — to row; to separate; loose, sparse, rare.
Ancestry of “Rusi”, step by step
Rusi traces back through 3 separate lines of ancestry.