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| River Name | Wikipedia Link | Notes | |
|---|---|---|---|
| Maine | https://en.wikipedia.org/wiki/River_Maine_(County_Kerry) | Marketing Comments: Fine | |
| Mulkear/Mulcair | https://en.wikipedia.org/wiki/Mulkear_River | Pronounced "mull-care" Marketing Comments: Prefer an easier name read/pronounce. Suggest avoid. | |
| Mawddach | https://en.wikipedia.org/wiki/Afon_MawddachMarketing Comments: Fine | ||
| Machrihanish | https://en.wikipedia.org/wiki/Machrihanish_Bay | Marketing Comments: Better known for the Bay. Suggest avoid. | |
| Minsmere | https://en.wikipedia.org/wiki/Minsmere_RiverMarketing Comments: Fine | ||
| Mondego | https://en.wikipedia.org/wiki/Mondego_RiverMarketing Comments: Fine | ||
| Moselle | https://en.wikipedia.org/wiki/Moselle | flows through Germany, Luxembourg, France, and the basin is in Belgium | |
| Morava | https://en.wikipedia.org/wiki/Morava_(river) | Marketing Comments: Fine | |
| Medveditsa | https://en.wikipedia.org/wiki/Medveditsa_(Volga)Marketing Comments: Possibly offensive. Suggest avoid. |