Duke Geoffrey I de Brittany 
Duke Geoffrey I was born about 0980 in Nantes, Bretagne, France. Duke Geoffrey I's father was Duke Conan I de Brittany and his mother was Ermengarde de Anjou. He was an only child. He died on November 20th, 1008.General Notes
Duke of Brittany
They had a son named Count Eudes.
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Children
Count Eudes de Brittany
Count Eudes was born about 0999 in Penthievre, Bretagne, France. He died on January 7th, 1079.
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