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Guerech
Duke of Brittany
Reign	981–988
Predecessor	Hoël I
Successor	Alan of Nantes

Died	988
Spouse	Aremburga of Ancenis
Issue	Alan, Count of Nantes
House	House of Nantes
Father	Alan II, Duke of Brittany
Mother	Judith

Guerech of Brittany, was Count of Nantes and Duke of Brittany from 981 to 988.