Geoffroi I Duke de BRETAGNE 
Geoffroi I Duke de was born in 0972 in Rennes, France. Geoffroi I Duke de's father was Conan I 'The Crooked' Duke de BRETAGNE and his mother was Ermengarde D' ANJOU. He was an only child. He died at the age of 36 on November 20th, 1008.
They had a son named Eudes, Comte de Penthievre, Regent de.
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Children
Eudes, Comte de Penthievre, Regent de BRETAGNE
Eudes, Comte de Penthievre, Regent de was born in 0999 in Penthievre, France. He died at the age of 80 on June 7th, 1079.