| Oise tributary |
| Rhone tributary |
| Kura tributary |
| Dwellers along a tributary of the Little Colorado River |
| Isère tributary |
| Rhine tributary in Switzerland |
| Aisne tributary |
| Amazon tributary |
| Colorado tributary |
| Oder tributary |
| Ruhr's main tributary |
| Fulda River tributary |
| Rumanian tributary of the Danube. |
| River in Czechoslovakia, Danube tributary. |
| Tributary of the Colorado River |
| Rhine tributary (Var.) |
| Marshy tributary, e.g. |
| Mississippi tributary in Mississippi |
| Rhine tributary. |
| Tributary of the Congo |
| Rhein tributary |
| Ligurian Sea tributary |
| River tributary, often |
| The Aragón is a tributary of it |
| Seine tributary near Paris |
| North Sea tributary |
| Rhine tributary of Switzerland |
| ___ Darya (Aral Sea tributary) |
| Tributary |
| Marshy tributary |