Eudes, Count of Penthièvre
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Eudes of Rennes (999 - 1079), count of Penthievre, was the youngest son of Duke Geoffrey I of Brittany. Following the death of his brother Duke Alan III, Eudes ruled as regent of Brittany in the name of his nephew Conan II, between 1040 and 1062. Eudes married Agnes of Cornwall, sister of Hoel II of Brittany and had:
- Geoffrey I, count of Penthièvre
- Stephen, Count of Tréguier married Havise of Guingamp
His descendants became the junior branch of the Breton ducal family, that assumed control of the duchy in 1156 under Conan IV of Brittany.
