Back Gwereg (dug Breizh) Breton Guerech de Bretanya Catalan Guérech (Bretagne) German Γκερέκ της Βρετάνης Greek Guérech de Bretagne French Guerech da Bretaña Galician Guerech di Bretagna Italian Guerech Dutch Guerech Polish Гюереш (герцог Бретани) Russian
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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.