Geoffrey I, also known as Geoffrey of Rennes and Geoffrey Berengar, was the eldest son of Duke Conan I of Brittany. He was Count of Rennes, by right of succession. In 992 he assumed the title of Duke of Brittany, which had long been an independent... Wikipedia
Born: 980 AD, Rennes, France
Died: November 20, 1008 (age 28 years), Nantes, France
Parents: Conan I of Rennes and Ermengarde-Gerberga of Anjou
Grandchildren: Hawise, Duchess of Brittany, Conan II, Duke of Brittany, Stephen, Count of Tréguier, and more
Children: Odo, Count of Penthièvre, Alan III, Duke of Brittany, and Evenus de Bretagne
Spouse: Hawise of Normandy (m. 996 AD–1008)