Family
ClaimDetailEvidence
FatherConan de Rennes, Duke of Brittany (e938-992) [S756] [S915]
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MotherErmengarde d’Anjou (e965-) [S756] [S915]
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SpouseHavise de Normandie (e979-1034) 
Child +Alain III, Duke of Brittany (~997-1040) [S756] [S916]
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Child +Emma (~997-) [S1694:744]
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Child +Eudes de Bretagne Duke of Brittany (999-1079) [S756] [S915] [S3153]
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Attributes
ClaimDetailEvidence
GenderMale
NameGeoffroy de Bretagne , Duke of Brittany [S915]
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NameGeoffrey , Duke of Brittany [S756]
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NameGeoffrey , Count of Bretagne [S1694:744]
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NameGeoffroy I, Duke of Brittany [S916] [S2611]
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FatherConan de Rennes, Duke of Brittany (e938-992) [S756] [S915]
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MotherErmengarde d’Anjou (e965-) [S756] [S915]
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Timeline
ClaimDateDetailAgeEvidence
Birthabt 980France [S756] [S915]
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Title992Duke of Brittany [S756] [S915] [S916]
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Marriage996Havise de Normandie (e979-1034) [S756] [S915] [S2611] [S2855]
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DeathNov 20, 1008 [S756] [S915]
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Sources
IndexTitle
[S756] Weis, Frederick Lewis, "Ancestral Roots of Sixty Colonists Who Came To New England before 1700, 7th Ed." (Genealogical Publishing Co., Inc., Baltimore, 1999).
[S915] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Brittany: Dukes)" (2006-7 (v1.3 Updated 21 July 2007)) (https://fmg.ac/Projects/MedLands/BRITTANY.htm).
[S916] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Central France: Blois, Tours)" (2006-7 (v1.1 Updated 18 October 2006)) (https://fmg.ac/Projects/MedLands/CENTRAL FRANCE.htm).
[S1694] Ormerod, George, "The History of the County Palatine and City of Chester, Volume 1" (1819) (https://books.google.com/books?id=DYY1AQAAMAAJ).
[S2611] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Normandy: Aumale, Rouen, Eu )" (v4.2 Updated 30 May 2018) (https://fmg.ac/Projects/MedLands/normacre.htm).
[S2855] Cawley, Charles, "Foundation of Medieval Genealogy (Medieval Lands - Norman Dukes)" (https://fmg.ac/Projects/MedLands/NORMANDY.htm).
Kinship Lines for Geoffroy de Bretagne, Duke of Brittany
Spouse/PartnerDegreeRelationshipMRCA
Havise de Normandie (e979-1034)114th Cousin 1x removedPepin, Count of Senlis (~815-)