| VITIM | Russian river, a tributary of the Lena, upon which Bodaybo, Irkutsk, stands |
| ANGARA | River in Siberia flowing from Lake Baikal to the Yenisei River upon which Irkutsk stands (6) |
| ONA | Russian river a.k.a. Biryusa |
| OLGA | Heading off from Russian river, a local girl? |
| BLACKWATER | A short Highland river, a tributary of the River Conon (10) |
| WEY | River, a tributary of the River Thames, with two separate branches which join at Tilford (3) |
| TEVIOT | Scottish Borders river, a tributary of the River Tweed (6) |
| ENNS | Austrian river, a tributary of the Danube (4) |
| TIGRIS | Asian river, a tributary of the Euphrates (6) |
| YAKUTSK | Capital of the Sakha republic (Yakutia) of eastern Russia, on the Lena River (7) |
| VYATKA | River in Russia, a tributary of the Kama River upon which Kotelnich stands (6) |
| WHOTHEHELLKNOWS | Left tributary of the Vitim River in Irkutsk Oblast, Russia |
| ESSONNE | Department in the Ile-de-France region named after a river which is a tributary of the Seine (7) |
| LHASA | Capital of Tibet, in the northern Himalayas on a tributary of the Brahmaputra River (5) |
| MOHAWK | River of New York, a tributary of the Hudson River (6) |
| VLTAVA | The longest river in the Czech Republic, a tributary of the Elbe (6) |
| GILA | A river that rises in western New Mexico and flows westward through southern Arizona to become a tributary of the Colorado River. |
| CHEADLE | Historically within Cheshire, this suburban village of Greater Manchester is three miles from Stockport town centre; it lies on the Ladybrook, a tributary of the River Mersey (7) |
| BLAISE | River in the Haute-Marne and Marne departements of northeastern France that is a tributary of the Marne |
| TICINO | Canton of Switzerland named after a tributary of the Po River (6) |
