Geoffrey I, Duke of Brittany
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Geoffrey I of Rennes (980 – November 20 1008) was duke of Brittany, from 992 to his death. He was son of Duke Conan I and Ermengarde of Anjou. He married Havise of Normandy and had at least two sons: Alan III his successor, and Eudes, Count of Penthievre.
See also: Dukes of Brittany family tree
| Preceded by: Conan I | Duke of Brittany | Succeeded by: Alan III |
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