title: Monterrein
text: # Monterrein
  
  Monterrein (French pronunciation: ​; Breton: Mousterrin) is a former commune in the Morbihan department of Brittany in north-western France. On 1 January 2019, it was merged into the commune Ploërmel. Inhabitants of Monterrein are called in French Monterrinois.
  
  