Meuse

The Meuse (/mjuːz/ mjooz; French: la Meuse [møz]; Walloon: Moûze [muːs]) or Maas (Dutch: Maas [ˈmaːs]; Limburgish: Maos Template:IPA-li or Maas) is a major European river, rising in France and flowing through Belgium and the Netherlands before draining into the North Sea from the Rhine–Meuse–Scheldt delta. It has a total length of 925 km (575 miles).
The name Meuse is derived from the French name of the river which ultimately derives from the Celtic or Proto-Celtic name *Mosā.

The Dutch name Maas descends from Middle Dutch Mase, which comes from the presumed but unattested Old Dutch form *Masa, from Proto-Germanic *Masō. Modern Dutch and German Maas and Limburgish Maos preserve this Germanic form. Despite the similarity, the Germanic name is not derived from the Celtic name, judging from the change from earlier o into a, which is characteristic of the Germanic languages.