- Czech name for Moravia
- river in Moravia flowing south along the Austrian border, into the Danube: c. 230 mi (370 km)
- river in E Serbia, flowing north into the Danube: 134 mi (216 km)
- A river rising in the eastern Czech Republic and flowing about 365 km (225 mi) generally southward to the Danube River near Bratislava, Slovakia.
- A river of eastern Serbia rising in two forks and flowing about 209 km (130 mi) north-northwest to the Danube River east of Belgrade.