| River Name | Wikipedia Link | Notes |
|---|
| Magdalena | https://en.wikipedia.org/wiki/Magdalena_River |
|
| Maroni | https://en.wikipedia.org/wiki/Maroni_(river) |
|
| Mataje | https://en.wikipedia.org/wiki/Mataje_River |
|
| Marne | https://en.wikipedia.org/wiki/Marne_(river) |
|
| Meta | https://en.wikipedia.org/wiki/Meta_River |
|
| Meuse | https://en.wikipedia.org/wiki/Meuse |
|
| Moselle | https://en.wikipedia.org/wiki/Moselle |
|