- Рубикон (Bulgarian, Russian) Ruhr Ruhr (German, Dutch, French, Low German),
Ruhra (Polish), Rúr (Czech), Rura or
Rurinna (Latin) Rur Roer (Dutch, French,...
- Main
Czerwony Men (river)
Ruden Rudno (island) Rügen
Rugia (island) Ruhr
Ruhra (river)
Saale Soława (river) Saar
Saara (river)
Schmollensee Jezioro Smolno...