Schwarzach

Schwarzach (German pronunciation: [ˈʃvaʁtsax]; Czech: Nemanický potok) is a river of Czech Republic and Bavaria, Germany. It is a left tributary of the Naab. It passes through Waldmünchen, Rötz and Neunburg vorm Wald, and flows into the Naab near Schwarzenfeld.

Source: Wikipedia https://en.wikipedia.org/wiki/Schwarzach_(Naab)