Wondreb
The Wondreb is a river in Germany and the Czech Republic, a right tributary of the Ohře River. It flows through Bavaria and Karlovy Vary Region. It is long.
Etymology
Both the German and the Czech name have their origin in Proto-Indo-European ad-ra, meaning "flowing water".Characteristic
The Wondreb originates in the territory of Stará Voda in the Upper Palatine Forest at an elevation of and until its confluence with the brook Griesbach, it is known as Nikolausbach/Mikulášský potok. The river flows to Odrava, where it merges with the Ohře River at an elevation of. It is long, of which is in Germany, is in the Czech Republic and forms the Czech-German border. Its drainage basin has an area of, of which is in Germany and is in the Czech Republic.The longest tributaries of the Wondreb are:
| Tributary | Length | Side |
| Lipoltovský potok | 21.5 | right |
| Muglbach / Mohelenský potok | 19.1 | right |
| Seibertsbach | 16.5 | left |
| Stebnický potok | 12.9 | right |