Muren may refer to. a number of rivers in Mongolia, Inner Mongolia, and Manchuria (cf. Mongolian: Мөрөн, Mörön - "river"), for example. the Muling River, a left tributary of the Ussuri, Shar Mörön (Chinese: 西拉木伦河), one of the headwaters of the Xiliao He, which in turn is one of the headwaters of the Liao River, Delgermörön, one of the headwaters of the Selenge, Mörön (city), a town on the Delgermörön, Mörön Airport. Muren, Indiana, an unincorporated community in the United States.
https://en.wikipedia.org/wiki/Muren