Eudes was also Count of Brittany. "Ancestral Roots..." (Balt., 1992), 39-23, gives as a son of Geoffrey I and Hawise:
"Alan III, Duke of Brittany, d. 1040; m. ca. 1027, Berthe, d. 1084/5, dau. of Eudes II, Count of Blois, by his wife
Ermengarde of Auvergne."

References: [AR7],[Weis1],[PlantagenetA],[ES],[RoyalAAF]