Geoffrey I Duke of Brittany

✓ Geoffrey I (Geoffroy), Duke of Brittany (992-1008), son of Conan I (I100096) and Ermengarde of Anjou (I100097) - RING: joined to his parents' existing family F99901 as brother of Judith of Brittany (I100095); m. 996 Havise, daughter of Richard I, Duke of Normandy, and Gunnor; d. 20 Nov 1008 on pilgrimage. Father of Alan III and of Eudes of Penthièvre. Source: Medieval Lands (fmg.ac, Cawley), Brittany Nobility (Penthièvre) (Brittany Dukes; William of Jumièges). [DIRECT ANCESTOR OF THE COMPILER: flag added 15 Oct 2026 by walking the tree from Aynsley, so that this marker is reliable and can be searched.]