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Male Geoffrey I Duke of Brittany Click to view Geoffrey I Duke of Brittany in the family tree

Geoffrey I Duke of was born about 0980 in Brittany,France.1   Geoffrey I Duke of's father was Conan I Duke Of BRETAGNE and his mother was Ermangarde Gisgonelle D' ANJOU.  His paternal grandparents were JUHEL BERENGER, Count of Rennes and Gerberge Du MAINE; his maternal grandparents were Geoffroy I "Grisegonnelle" Count Of ANJOU and Adelaide de Vermandois. He had a sister named Judith.  He was the older of the two children. He had a half-brother named Judicael de.  He died on November 20th, 1008 in Brittany,France.2 


Geoffrey I Duke of's family with Avicia or Hawise of Normandy

‌Geoffrey I Duke of and Avicia or Hawise of were married in a religious ceremony in 0996.1   They had a son named UNKNOWN.

1 Ancestral Roots of Certain American Colonists, 7th Edition, by FrederickLewis Weis, additions by Walter Lee Shippard Jr., @ 214-22
2 Cokayne's Complete Peerage @ 39-22
Further sources/citations:
Ancestral Roots of Certain American Colonists, 7th Edition, by FrederickLewis Weis, additions by Walter Lee Shippard Jr., @ 39-22, Cokayne's Complete Peerage


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