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Male Geoffrey I De Bretagne Duke Click to view Geoffrey I De Bretagne Duke in the family tree

Geoffrey I was born in , , , Bretagne.  Geoffrey I's father was Conan I Of Brittany Duke and his mother is Ermengarde (Hermengarde) Of Anjou.  His paternal grandfather was Juhel Berenger Of Rennes Count and his paternal grandmother is Gerberge (); his maternal grandparents were Geoffrey I Grisegonelle Of Anjou Count and Adelaide (Adela) De Vermandois. He had a brother and a sister, named Geoffrey and Judith.  He died on November 20th, 1008.  He was buried in 1008.


Geoffrey I's family with Hawise Of Normandy

They had two sons named Eudes and Alan III.

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