The identification of this river has not been resolved, also due to considerable changes of the historic watercourses. The name does not give any clue and, obviously cognate with Dutch nevel and German Nebel, both ‘fog’, and derived from Proto-Indo-European *nebʰ- ‘sky, cloud’, would be a trivial synonym for any river. Proposed are the rivers Utrechtse Vecht and Hollandse IJssel.
