Frohnhauser Bach
The following rivers are called Frohnhauser Bach :
- Frohnhauser Bach (Rammbach) (GKZ: 27639144), right tributary of the Rammbach in North Rhine-Westphalia.
- Frohnhauser Bach (Wupper) (GKZ: 27363116), right tributary of the Wupper in Hückeswagen, North Rhine-Westphalia.